Help me build my PC!

You could probably save on the case by going with a cheep/free option... (I could find an old beige case probably for free in the trash somewhere, just have to gut it )

I'd recommend against buying on eBay and getting it from Newegg instead. Yeah, eBay may be cheaper, but you get what you pay for. Newegg's customer service is awesome. And what if one of the parts is DOA? Good luck with the eBay seller. You'll have no trouble with Newegg.

Go with newegg for sure. Depending on how much you want to spend, get a WD Raptor for a main drive, then a large one for storage. Keep just programs on the Raptor. OR, just raid two drives together for main, and then a third for storage. I use this setup, and it works great. Plus, 74GB (Raptor) is a lot more than you think when it comes to just programs and windows. Also, get XP Pro. Vista is crap for most stuff, which is why microsoft is skipping right to their new OS, and not working on Vista. To put it in perspective, i built my system over three years ago, and it still runs games good, where as heavy users will find that systems go "old" in a year or so. Also, my system was fairly low end when i built it because i was poor.