im building a sff system, i will use a x2 4400 cpu, and no video card (on board graphic), i prefer an at least 400w power supply, but i then found most nice-looking media center case only have 200-300w power, and correct me here, i think these sff case use slim power supply compare with the normal atx case, so i cannot change the power supply. can anyone tell me how much power i should use for my system (x2 4400, 2g ram, 1 hard drive, 1dvd burner), and do u have any brand or model to recommend? thx all.