Currently playing through Suikoden 5 for the first time - imported NTSC-U copy on imported NTSC-U PS2 (75000 model) when the missus wants to use the PC, and on PCSX2 1.0.0 when I have free reign of the house. Thankfully I have FMCB to move my save file back and forth between the two devices. 
I'm trying to play mainly on PCSX2, because
a) it looks so good with only very minor glitches,
2) wireless controllers are great, and
thirdly) my PS2 is possibly starting to die, and I want to save it for games that don't emulate well (VP2 is on my backlog, and it's apparently got some big issues with emulation).
As for Suiko 5 itself? It took a while to grow on me, but I'm really enjoying it now. I'm about halfway through or so, based on my star count, and I'm rocking a pretty OP team - Cross formation with Richard/Kyle/Belcoot/Lyon/Prince/Zerase.