I'm running reaper 32 under windows 7 64 that way i can use all my VSTI's/plugins etc and Reaper can access 4 gigs of RAM :D using 32 bit stuff I'm also running Jbridge so I can use Halion 3.5 64 bit and EWQL Play 64 under reaper 32 and have access to my full 8 gigs of memory from these samplers. At the moment running a 32 bit DAW under a 64 bit OS is the best comprimise, MC