yup...the smaller cache of the e2180 is only really noticable in some benchmarks and high-end games. So really for a general use pc the e2180 overclocked to around 3ghz will be as good as the e6750. If you want something mid range (cache wise) get something from the e4xxx series like the e4500.
If you are getting an 8600 series card, get the 8600GTS, as it out performs the GT. I like MSI - look out for their pre-overclocked cards as often they have better cooolers (http://www.newegg.com/Product/Produc...82E16814127284). But still at the price of the 8800GT or 8800GS at the moment I would shell out the extra for one of those.
I'm still building taking notes from this thread. I believe I'm almost done. So far, I have:
Cooler Master 534 RC
MSI NX8600GT-T2D256E OC GeForce 8600GT 256MB 128-bit GDDR3
G.SKILL 2GB (2 x 1GB)
SAMSUNG 20X DVDÂ±R DVD Burner with LightScribe Black SATA Model SH-S203N - OEM
LG Black IDE DVD-ROM Drive Model GDR-H30NK - OEM
Now all I need is some CPU cooling and a PSU and I should be set. The total cost SO far is $481.92. If I get that quad-pipe 8800GT, it comes to $619.92 before PSU and cooling and shipping. If I get the $132.99, OC'd 8600GTS, then it comes to $522.92. But I'm not done yet! Once I have settled on a PSU and cooling, I'm going to figure out the video card.