tbh I don't think that there was a good 650i SLI mobo.Abit Fatal1ty Fp-In9 Sli had to be one of the worst boards I've ever had in my life, so on that I can understand why they're no longer with us.
same as imo the other candidate for worst abit mobo was the F-I90HD where again I lay the blame at the door of the chipset. Not really surprising to me that only 1 other mobo afaik was made using that chipset.