My EVGA 680i came with P23 Beta 2 installed. I had intermittent problems with that, mainly SATA related. Then I installed P23 final. After a day or two I lost all my BIOS settings and USB stopped working. I re-flashed to P23 Beta 2 and everything worked (mostly). I tried P24 and that has fried one memory stick and won't even post at all now so it's going to be RMA'd.
Next motherboard may be a Striker (I know), or Abit IN9 32X-MAX or the P5N32-E Plus SLI.
Bah.
I'd go with the P5N32-E Plus over the Striker Extreme. The Striker has been problem free for me, excluding the sound issue and failed BIOS flash, but it simply isn't worth the extra cost compared to other 680i solutions.