Depends what you want to be able to do. If you just want to play your ps1/ps2 backups get a Messiah 2($45) or Apple Pro($20). If you want extra features such as macrovision free and mostly other pointless stuff, get a DMS3($60)
Look
here for installers in your area.
I you want to talk more, I am on AIM under FileForumsGod