I don't know about you guys, but I've never spent 270$ on a motherboard. Is it really necessary to spend this much? Does anyone know if cheaper motherboards are being released in the future or if there is a cheaper substitute I can buy now? Don't get me wrong. I don't want a mobo that is crap. I want something that is good and stable.
If you're not going to overclock, then getting the X965 boards (x = P or G) is a decent route.
Also, since you're not going to overclock, you won't need DDR2-800 (PC6400) memory, either. Just get 667 or even 533, but I would go with 667.
I think the Gigabyte or Asus P5B would be the best choices, since there has been some bad press about the G965 series.
Right now DDR2-667 and DDR2-533 are similarly priced, but DDR2-800 is more expensive.