If you drop that raptor or even dropping both hdds and getting 2x250gb in raid like i did, then you could get the windows vista (which i suggest not to right now and just get a good win xp home for the time being). Also you could get a better monitor like this one:
samsung 19" WS
$190 (after mail-in-rebate)
Now your build will blow that hp away. It might cost an extra 100-150 dollars with that monitor but compared to the 7300le (laughs) and generic stuff hp uses...yeah your build all the way. Also you won't be able to overclock an hp since they lock the bios. With your build, you should be able to get 3.4ghz with that zalman 9500 (w/ some as5)....i did easy
. Now 3.4ghz conroe compared to 2.66ghz conroe.....yeah thats my point
Hope that helps you out.