Can't go wrong with OEM here. My next set of rotors however won't be OEM, unless I still have that set in my parts box.

On this, I'd say it's tough to buy a "bad" product. You just need them true and to be able to dissipate heat in a uniform fashion. With that said, there was a debate on here awhile back about the merits of eBay rotors. I was on the "for" side, but I can't advise you on it as I haven't yet purchased. A particular seller was mentioned.