I had an 07 stumpy expert before I sold the frame for a BLT1 when the lt2 came out (got a super deal). In my experience, the stumpy, even with the brain, bobbed when I climbed, where as the vpp does not. Otoh, I felt it was a little more plush on the smaller hits. The stumpy is going to give you waay better parts than the blur at that price range, and that's why I went with the stumpy over the blt1 in the first place. You'll get an ano frame, talas rlc, magura brakes, xt/xo drivetrain; it's a damn nice build.
the lt2 will no doubt be a lot stiffer, as tons of people have said the lt2 is stiffer than the lt1, and i thought the lt1 was a big improvement to the fsr. you'll get the lifetime warranty on the frame and shock. but, at the same time, the new lt2 is supposed to be the ultimate trail bike. it will cost you double for the same spec as the stumpy, but it depends on how the bike feels to you.
4k was the retail price, 2750 still sounds a bit high for an 07 bike, especially with xmas past and a crappy economy still pushing through. if you can knock that down to 2500 tax included, it would be a steal.