You quote that your 2 psu's will equate to 700w, but under load that will drop significantly, also your 5v,12v and 3.3v rails will fluctuate like mad, making your idea for 2 cheapy psu's a bad one as opposed to getting one decent psu.
Your p.c will not be stable, if you want to overclock - forget it!
Anyway, why would you want to with a 15" monitor, it's hardly going to be taxing at 800x600 now is it
Still think your taking the mick - so im just not going to bother replying to your threads as it's annoying.