i gotta say more dads in this world should be like you!
i would also recommend gettin a lian li case, as those are the biggest and the best of all the cases.
i kno you said watercooling is out of the question, but may i ask why? if you think its too much of a hassle to do it urself, you could always get this:
http://www.koolance.com/shop/product_info.php?cPath=28_41&products_id=190
Its an Koolance Exos 2 ( in black or silver) and it is a really good water system with the EASIEST setup. all you have to do is stick 2 tubes from a pci slot onto the waterblock and mount it. its just that simple. It offers up to 700 Watts of cooling, which means you can also get this for your dual 7800 GTX's:
http://www.koolance.com/shop/product_info.php?cPath=29_46&products_id=174
that is the best 7800 GTX waterblock, as it cools both the gpu and the memory and it is designed to work in a SLi setup as well.
If you get the watercooling system setup, you can actually save money. This is because you can buy the Venice 3000+ instead of the fx 57. Two of my friends have just recently bought the chip based on my recommendation. they run theirs at 2.8ghz and 2.9 ghz respectively, with a sp-97 at 1.45v and 1.55v respectively. with water, hitting 3.0ghz shouldnt be a problem. the venice 3000+ costs 136 on newegg, the fx 57 costs
1011. the koolance setup costs 600 dollars. you're gonna end up with the same cpu performance, way better OC's on ur SLi,
300 more bucks to spend on some elite hardware, and not to mention having a very high "bling" factor:
All koolance waterblocks are 21k gold plated.
ADOPT ME PLEASE!!!