I have two desktops at home, the newer one is custom put together by me while the second is prebuilt. My prebuilt stopped working recently and I decided to get a new computer. Now I haven't built a computer for ~2 years so I'm not sure how prices have changed and what I should do. I need this computer to basically a smooth running web browsing/email computer and I'll add a graphics card so my brother can play some games. I'd like to spend around ~$600, I only need the tower, I have a keyboard and everything else. Some comments and suggestions please, thanks! BTW, i've seen these new dual core cpu's. which run at 1.9, so how would a computer with dual core 1.9 ghz run vs a the 'regular' 2.4 ghz single core cpu?