Well i think I'm going to go with the M4A89GTD Pro. However, i did read somewhere that big GPU's can cause problems fitting into the board. Will there be a problem fitting my GTX460 into this board?
That should fit fine as long as you don't have the passively cooled Sparkle SXS4501024D5SNP.
edit: after double-checking - even then I am pretty sure you'd be OK.