I have a year-old Dell p2450 tower...I read somewhere a while ago that Dell uses cases which generally don't fit much in the way of hardware substitutions. In particular, standard power supplies and standard motherboards. Anyone know if this is true? My currect motherboard is just a se440bx-2, but is it possible dell has a specially-made version of this mobo that fits specifically into their cases? And as for power supply, my measly 200W needs replacing, but like I said, I read that Dell cases won't fit non-Dell ones. Any help?