i also trust what bombeboy says but the 750 chipset really isnt that bad it comes out better than the 780a, i do know what he is talking about and it does make sense that amd works best but the are several advantages over 790fx, the usb speeds are substantially faster, and cpu usage is lower when doing this, the 750 also has support for raid which amd does not, there are also several other features like hybrid power that save power.
With referencer only to the 750a chipset they are review as being pretty solid
In the benches that i'm looking at the 750 chip set outperforms both the 780a and the 790fx in gaming, albeit marginally.
In the reviews i have read there are no compatibilty issues or any particular problems 
I also own this board and bought it because i have used amd/ati for many years now and wish to change and this seems like the best budget option on for sli with amd and sli scales better than crossfire, now only about 10% better but still.
I'm not sure if your talking compatibility or what but i would like to know exactly what details make it bad, i'm not saying it is the best but it is certainly not the worst, i only suggested it because the op was opting for nividia not amd and so sli would make sense for the same price, the only thing i have come across is that this series of nforce is not as good for ocing in comparison to amd chipsets and some slight latency issue with due to the design of the pic-express but that is it.
and just to clarify no one else on this thread has said it is a bad choice, they just recommended a crossfire board over sli because the op has now chosen a ati/amd card
sorry to go off topic i'm just wanting a in depth answer to further my knowledge