What's funny, where technology really matters, in mountain biking, most rigs cost under $4k; nothing to sneeze at but we're talking US welded frames with xtr and great wheels. Unless of course you WANT carbon, which is suspect to me simply because you really don't gain much. Even weight saving are minimally important except for serious XC racers. My giant anthem 29er came with SLX, sunk less than $1200 into if now have xtr w/xt brakes, better wheels, more robust cockpit and a1x10 drivetrain w/ 4 different mrp chainrings. Oh and put a selle italia saddle on it that I got for nothing.
Basically top tier tech for about the third of a halo road bike.
And for what it's worth, lower specced frames from pretty much every brand are universally good bikes and not obscene. Cannondale caad10, giant tcr/defy composite, etc. With the right parts you can build up these frames and have decently light bikes. My Tcx came in at 19 lbs 8 oz and that's with heavy, robust 105/a23. Giants $6800 tcx advanced sl has same geometry, but using Adam craigs bike as reference it saves a a couple pounds, most if which is probably in the wheels.
Bike industry is just silly. Find a frame that fits, slap some campy or shimano bits on the damn thing, build some wheels and just ride.