I'm thinking of jumping in on one of the cheapo (~$400) Dell PCs for use as an audio server. I would want to move the PC guts into a real HTPC case for asthetics. I know the motherboard and power supplies in most Dells are proprietary designs and would like some opinions on what sort of difficulty I might expect by changing cases. Will motherboard holes not align properly? Will the power supply not fit? Will I be unable to easily wire the power & reset buttons? What about adding extra hard drives? Are Dells open enough to accept new drives?