I'm not sure if i should get the Gigabyte GA-X58A-UD3R or the Asus P6X58D-E motherbard. I need to know if i can fit te Asus Xonar (PCi-Express version) and the Asus 5850 on the bairds easily. I see that the PCi-e slots are very close to the heatsinks- will thos cause a problem - also will the Noctua NH-D14 CPU cooler fir without any problems. Many thanks. I'll be running ths system with an intel Core i7 920 DO OC'd to 4GHz with 6GB of RAM (don;t know whicj yet but it needs to be low enough for the Noctua cooler.