help decide the gigabyte P5K / Asus P5B deluxe /Asus P5N32

hi,
have worked backwards
have bought my ram a 2 gb ddr2 kingston, have most of the other stuff needed to build a comp..

As i am "investing" in the 8800 Gts therefore plan to cut down on my processor costs so instead of a amd 6000+ or 6600 core 2 duo, i plan on the 5200+ or the 6400/6300 core 2 duo..

So that leaves me with question of a motherboard..

Been told that the P5K are gonna be around for a longer time..
and the gigabyte p5K can be had for 165$,
while the P5N32 e sli sounds good but as i plan on using onlyuone card i guess no point..

And the Asus P5B deluxe can be had for under 200$s.. ( while asus P5K is close to 250)

Please help me decide ,
thanks