Nice computer. You may want to get a 26" long pata cable if you are using ide since the ide is in a bad spot on the mobo. The Antec 900 is a great case. Kewl video card those ones are nice. Modular is sweet.
Vista isn't out of beta yet, so use XP, it works. The rest looks reasonable. Since you've bought the h/w already, I won't waste your time with niggling alternatives. If you choose to buy another IDE cable, consider a round one for best airflow.
When you guys are talking about ide cable your talking about the drive right?, you saying im gonna have problem plugging it in because its to short? As for the Dvd drive I want LG because I allready have lg and it never did me anything bad compared to lite-on who broke on me. As for loudness doesnt really matter because my computer's probably gonna be loud with all the fans. I bought vista cause it was really cheap and I didnt have to pay for shipping that's the only reason I got it ill see if it works good or else im gonna go back to xp till vista get fixed. THanks for the comments.
You're getting an IDE DVD-ROM; a cable connects it to the IDE header on your mobo. Paq says you may need a longer one, and I am suggesting you get a round one, as they are better for airflow than the standard ribbon cables.