Ryder,
Ever heard the expression "drive it like you stole it". That rules out the LS2 for me.
The L98 has better flowing heads than the LS2 and will respond well to a cam.
For 9k I'd be looking at a new LS3 from Holmart, below. Put the $1100 change towards ECU, gearbox etc from your wrecker.
VE 6.2 LT LS3 CRATE MOTOR BRAND NEW (VE)
Or the 6.0L from the VE for $6400.
http://www.holmart.com.au/online/prod336.htm
Or slightly cheaper here:
http://www.capa.com.au/hot_engine_packages.htm