I've recently picked up an M14x R1 and an R2. They are fun little machines and I have been doing some respray mods on them. The R1 I have resprayed a deep gloss red and I'm currently doing the R2 a gloss orange.
I'm also waiting on another R2 to arrive which is completely dead so it will probably need a new board.
See if you can get a good i7 CPU for your R2. Even a 3630QM would be a good upgrade but I'd suggest a 3740QM if you can grab one.
yea i got the base model (i5, 1gb 650m) and it trucks along well, i would have liked to do more research beforehand but the deal was too good to pass up and now that i've had it for a couple months i'm pleased so far, though i would have liked the extra gig vram to throw around