I have heard bad whispers about the Sampsun SpinPoint F1 drives too. I would just stick with Western Digital and Seagate.
About building your computer, if you follow instructions, use common sense, and have an IQ above...say...120, you will be fine.
I personally don't want the i7 seeing as how it is way too expensive for me right now what are they in the 1,000-2,000 dollar range.
It is not $1000 - $2000 dollars, even the link you included is $300.
You included two power supplies in your list, on under the "Vista" link. Make sure its 64 - bit. Don't buy a 5400 - 7200 RPM drive, its slow. I would still recommend high capacity drives for their better price / storage ratio's.
You didn't include a sound card.
Im not sure if you will need 6 gigs of RAM, the OCZ platnium 4 (2 x 2) gig is a nice set of RAM, im not sure if it is compatible with Core i7. Core 2 may also have compatibility issues with the 6 (3 x 2) kits.
core2 quad I really like them and what would i really need and i7 for anyways. All I want to do is A LOT of hardcore gaming.......
What makes you like them? Games do not appreciate quad cores.