I have my current system in an Antec Sonata (I, not II or III) case and I'm looking to upgrade. Right now I'm looking at something like a Core 2 Duo E6750 + GIGABYTE DS3R + GeForgce 8800GT. I understand I'll need quite a bit more than the existing power supply puts out (380W?). Given that I like the case, is it reasonable to replace the power supply with a 500W+ model? Will I have space issues with that mobo or vid card?