For the V1-V7 range a good choice is the Mars 2 chip (the one with 2 ICs on the back.) M320-L8
I've seen it labeled as :
"Caitta", "Latin", "M-2", "Mars II", etc...
They're the same chip. A decent boot rate, plays DVD9 HK silvers. It's tricky to disable so play online with it might be annoying. Besides that it's a good chip.
But hey. A Matrix Infinity (the real thing) is really worth your cash.
SCPH-10000_GH-001 SCPH-15000_GH-003 SCPH-18000_GH-008 SCPH-30001_GH-005 SCPH-30000_GH-016(V4) SCPH-30001_GH-010(V4)
2xSCPH-10190, 2xSCPH-10350, 2xSCPH-10280
"**** j0 hackers!"
-Sjeep (As seen on TOXIC OS ELF...)