The Rs will make a great sleeper car with the 420a engine it came with. I to have a 97 Eclipse Rs and heres a quick list of my current sleeper mods

Turbonetics T3/04(e trim) Turbo
Custom turbo manifold
delta II ext. wastegate
spearco FMIC
polished chrome i/c pipes
Blitz bov
custom 2.5 downpipe
Walbro high press. 225lph in-tank fuel pump
vortech 12:1 fmu

I have it set-up at 7lbs boost right now until I build up the bottom end. Sorry I cant give you any numbers yet havent had time to put it on a dyno or take it to a track.