Can I ask you to tell me some unbiased opinion about which would you think would be more stable today, a i7 920 D0 in a EX58-UD5 or a Q9650 in a EP45-UD3P?

For me, performance is not _that_ important, I would like to have a quiet and stable overclock for 24/7 usage, in the 3.6-4 Ghz range. Like how I am using my Q6600 @ 3.6 Ghz for more than a year now. Setting it up once and from that time no tweaking, not spending nights looking for more voltages, just a quiet, stable overclock for everyday work. The cooler would be a TRUE with a Scythe fan on it, for the i7 system I would need to buy more expensive RAMs and everything would be a bit more complicated, but if you say it's as stable as a UD3P could be than I would go for it.

What scares me most is that I still read about serious BIOS bugs, like no PWM no sleep, etc. I think those things are really smoothed out in the latest generation P45 boards.