Started with a 2009 Specialized Rock Hopper Comp Pro Disc and used the fork and old 9 speed sram shifters. Needed a new headset to make the fork work with the new frame. I figure my bike is worth a few grand locally. I've been wearing lined winter boots whenever it's below -10C because of wind chill of the speed I'm now going. Before I could get away with bike shoes and insulated Arctic thinsulate shoe covers to -18C or so (but I was much slower). I'll eventually go to a lighter fork since that's probably now the heaviest piece on it. I don't really need a triple on the crank with the new parts and fancy bearings. I never use the smallest chain ring. Taking about 40 minutes even in the current conditions with some snow (13km). I also don't need granny gears on my rear cassette - I'm pretty much in line with the road bike running speed 11-26's. I used to have 11-34's.
http://www.wiggle.co.uk/cane-creek-10-series-zerostack-1-18-inch-headset/
http://www.aliexpress.com/item/FLYXII-Brand-New-Full-Carbon-Glossy-Mountain-Bike-MTB-26ER-Bicycle-Frame-FR-207/2040925352.html?spm=2114.01020208.3.28.vWwTnn&ws_ab_test=searchweb201556_3,searchweb201644_4_10001_10002_10005_10006_10003_10004_9888_62,searchweb201560_6,searchweb1451318400_6148
http://www.aliexpress.com/item/1-pcs-NEW-20mm-Offset-Carbon-Fiber-Cycling-Bicycle-MTB-Bike-Seat-Posts-Seatpost-3K-27/32417970381.html?spm=2114.01020208.3.2.ZZHoVd&ws_ab_test=searchweb201556_3,searchweb201644_4_10001_10002_10005_10006_10003_10004_62,searchweb201560_6,searchweb1451318400_6148
http://www.aliexpress.com/item/Full-Carbon-MTB-Handlebar-3k-Glossy-Finish-640MM-Swallow-shaped-Carbon-Bike-Handlebar-Diameter-31-8mm/32371647972.html?spm=2114.01020208.3.18.h2jkel&ws_ab_test=searchweb201556_3,searchweb201644_4_10001_10002_10005_10006_10003_10004_62,searchweb201560_6,searchweb1451318400_6148
http://www.aliexpress.com/item/Carbon-Bicycle-stem-90-100mm-3k-glossy-cycling-handlebar-stem-for-MTB-bike-road-bike-stem/32397594239.html?spm=2114.01020208.3.137.pXLf5X&ws_ab_test=searchweb201556_3,searchweb201644_4_10001_10002_10005_10006_10003_10004_62,searchweb201560_6,searchweb1451318400_6148
http://www.wiggle.co.uk/token-tk878tbt-mtb-6873mm-ex-bb-tiramic-bearings/
http://www.aliexpress.com/item/KMC-X9-X9SL-X10-genuine-X10SL-9-27-10-speed-Mountain-Bike-Bicycles-hollow-gold-chains/32287044919.html?spm=2114.01020208.3.11.nBxYi8&ws_ab_test=searchweb201556_3,searchweb201644_4_10001_10002_10005_10006_10003_10004_62,searchweb201560_6,searchweb1451318400_6148
http://www.aliexpress.com/item/High-Quanlity-GUB-JY-C11S-Bearing-Jockey-Wheel-Rear-Derailleur-Pulley-for-Shimano-SRAM-H1E1/32274313831.html?spm=2114.01020208.3.3.O0Ongq&ws_ab_test=searchweb201556_3,searchweb201644_4_10001_10002_10005_10006_10003_10004_62,searchweb201560_6,searchweb1451318400_6148
...afterwards I upgraded the derailleurs to x9 from x7 Sram's
http://www.wiggle.co.uk/sram-x9-9-speed-3x9-front-derailleur/ ..went with 34.9 top pull
http://www.wiggle.co.uk/sram-x9-rear-derailleur-9-speed/
http://www.wiggle.co.uk/jagwire-hyper-teflon-gear-cable-kits/
http://www.wiggle.co.uk/shimano-xtr-m980-10-speed-hollowtech-ii-triple-chainset/ ...which I found for $299 USD all in from pricepoint on clearance
http://www.wiggle.co.uk/sram-pg950-9-speed-cassette-1/
...then did the wheels
http://www.aliexpress.com/item/MTB-mountain-bike-bearing-hub-six-hole-wheel-disc-magnesium-aluminum-alloy-wheels-wheelset/32573320728.html?spm=2114.01020208.3.11.hH1T2N&ws_ab_test=searchweb201556_3,searchweb201644_4_10001_10002_10005_10006_10003_10004_62,searchweb201560_6,searchweb1451318400_6148
http://www.wiggle.co.uk/schwalbe-ice-spiker-pro-performance-folding-mtb-tyre/ for winter
http://www.wiggle.co.uk/schwalbe-racing-ralph-performance-dual-compound-mtb-tyre/ for summer
http://www.aliexpress.com/item/AVID-DB1-Hydraulic-Disc-Brake-bicycle-bike-caliper-lever/1530769830.html?spm=2114.01020208.3.256.2vThOq&ws_ab_test=searchweb201556_3,searchweb201644_4_10001_10002_10005_10006_10003_10004_62,searchweb201560_6,searchweb1451318400_6148
...and upgraded the wheel bearings in the magnesium wheels from China with SiN4's (silicon nitride)
http://www.ebay.ca/itm/QTY-1-6200-2RS-10x30x9-mm-Hybrid-Ceramic-Rubber-Ball-Bearing-Bearings-6200RS-/231625030619?hash=item35eded7bdb:g:bewAAOSwPcVVqJ6U
and painted the rims with blaze orange plasti dip which is rubber to seal it out from salt for the winter. I popped the seals off the wheel bearings and bottom bracket bearings and scraped out the grease and replaced it with a combination of Amsoil low viscosity ATF, tungsten disulfide (ws2) powder (lowerfriction.com), and No Mor Friction (NMF - gonmf.com) and put it all back together. The chain is typically cleaned, dried and then coated with a paste made from tungsten disulfide and isopropyl brushed on and left to dry. Then I put the mix of atf, nmf, and ws2 on top. Hill climbs are much easier as a result.