Maximum PC

Well, now that my dad does not want my PC anymore (now my mom wants it) my mom just recently purchased a brand new Pent. 4 3.2 from a friend for only $100. I was surprised that she knew what a Pentium 4 was in the first place. Well, she said that the CPU does not go against my limit of $500, so now I can upgrade more. I have a question about the case. I originally thought of this case with the power supply

http://www.newegg.com/app/ViewProductDe ... 148&depa=1

But that case only has one fan. Reviews on Newegg said that the CPU runs hot, so I'm going to have to get a case with multiple fans. Will an Antec Sonata be suited up for this task, and is there a good powersupply that I can use that won't break the bank. I'll post the rest of the parts that I'm thinking of using later in the day (i'm doing this my school's library).

The sonata is good. Power supply, I dunno.