Hello guys!

Im thinking of switching out my old bike for a newer one. I have done some research and visited some bike stores, but cant decide wich one to select.
If this makes any difference, im more of a technical woods rides rather then flat/wide open. Im 175cm(5.9") tall, and weigh about 61kg(134 lbs).
There are 3 choices for me. (Spec list will be below)
1.) Brand new 29er, Merida Big Nine Lite 3000, 2012 version. Special price for me 1400
2.) Used Fuji Tahoe, repainted, with crack in frame. 2 years old. 1100.
3.) Minimally used Fuji SLM 1.0 26". 1300

Now the spec list for bikes.

1.) Merida Big Nine Lite 3000 2012 12.9kg
Frame: Aluminium
FORK: Fox F32 Fit 29er RLC 100 Taper 15mm
DERAILLEUR REAR: Shimano Deore XT-10
SHIFTERS: Shimano Deore XT Rapidfire
BRAKES: Shimano Deore XT-Fin
CHAINWHEEL: Shimano Deore XT 42-32-24
CHAIN: Shimano CN-HG74
HUBS: Shimano Deore XT-15 mm / XT-12 mm
RIMS: XCD Lite Big29 D
FREEWHEEL: Shimano CS-HG81-10 11-36
TIRES : Schwalbe Racing Ralph Evo 29 2.25 Fold
HANDLEBAR: FSA Afterburner Flat 670
SADDLE: Selle Italia SL XC M
PEDALS: Shimano M520

2.) Fuji Tahoe
Frame: Aluminium
Fork- Rock Shox Reba 29 RL Dual Air
Front Brake - Avid Elixir 5S, 180 mm
Rear Brake - Avid Elixir 5S, 140 mm
Wheels - DT Swiss XR39 Disc, 32H
Hubs- DT Swiss XR39 Disc IT
Tires - Shwalbe Racing Ralph
Bar - Scott Hot Rod Tbar OS 31.8mm
Stem - Scott Comp, Oversize 31.8mm, 1 1/8, -6 angle, 80mm, UUS
Seatpost - Scott RC 05
Saddle - Selle Italia Team Edition
Cranks - Shimano XT
Rear Der. - Shimano XT
Front Der. - Shimano SLX
Chain - Shimano CN-HG54
Shifters - Shimano SLX
Pedals - Shimano M520

Most of parts are actually brand new.

3.) Fuji SLM 1.0 26" 8.5kg
Frame: Carbon "M" ( 173-185cm)
Fork : Trigon Full Carbon
Handlebar: Truvativ Stylo WC
Stem: Truvativ Stylo WC
Front Der. Sram X0
Rear Der: Sram X0
Shifters: Sram X0
Cranks: Sram X0 2x10
Chain : Shimano XT HG94
Cassett : Shimano XT M771
Pedals : Exustar Titan Axle
Brakes: Avid Elixir CR ( 2 X 160mm )
Bottle cage: Carbon
Wheelset: Mavic Crossmax SLR
Tires: Schwalbe Furious Fred (2.25)
Saddle: Prologo
Saddlepost: Integrated with frame, carbon

Id be very thankful for any kinds of answer, suggestions. Really need them to make up my mind.