I've got a Soloist and my mate has a life and they are lovely bikes! well finished and just ride 'right', nice and solid with no rattles! I ride an 18" and I'm 6"1.
yes, they're top frames. had mine going both up and down proper mountains for a year. wasn't much that i felt i couldn't tackle (within reason for a XC bike).
brilliant finish on the frames. nicely finished drop-outs.
you will only get 160mm rotor in at the rear but it will take 2.4 maxxis tyres.
have had 80mm mani-poos (very head down/sharp/quick steering) in there as well as the revs. usually ride it stuck at around 120ish.
here's what mine currently looks like
and here's what it looked like a few weeks ago whilst my other bike was on the mend (wider bars and different brakes; ride better with wider bar)