computer components & hardware - Asus P5K Deluxe Wifi or Asus Blitz Formula?

While finally close to rock stable my latest upgrade/rebuild hasn't gone
too well and am coming to the conclusion my P5N32-E SLI may be to blame
(almost everything else has been swapped/replaced or removed). Anyhow...

Components are :-

E4300 Core 2 Duo (o/c to 3.0GHz)
2GB PC6400 Crucial Ballistix Tracer
320MB 8800GTS
3xHDD and 2 DVD-RW Drives
700W PSU
Kandalf LCS Case (Water cooled CPU)

I don't need SLI/Crossfire so motherboards based on P35 chipset are
fine, I was going to get the P5K but a number of suppliers have the
Blitz formula only £10-20 more and as I've just dipped my toe into
watercooling the Blitz Formula is just a little more appealing with its
water cooled chipset option.

Niether board is cheap and both have good reviews, I need the board to
be a good O/C and to be able to take a quad-core or better in the future.

Any advice appreciated.