I'll just add my 2 cents and re-afirm the V3 behaved better over the V5. I also probably have an old post or email here some where that explained why the V5 didn't give expected performance boost of V3/V4 because of memory speed/bandwidth/architecture issues. Darn head cold is making me to lazy to go through the ancient files though.
I think the V4 was supposed to be better, but I've not tried one myself.
As far as I know, I was also the only one to get an S3Virge DX card to work at all. It was recognised and I could get it to do test patterns through the config util, but the system would hang immediately after that.
Plaz