yes you should be able to transfer your components without reinstalling windows, one thing you ought to know is that dell cases are custom made and the power button and the front panel might be some kind of a head ache because they usually use diferent wiring layouts, if you choose to transfer your components, my recomendation is browse the internet for the front panel diagram in the motherboard so when the new case arrives that wont be a problem
regarding the Power supply i thought those days where over after pentium 4 but maybe maybe just in case go for the one they tested in the other post and knew that worked fine
The one they tested is discontinued and may not be needed for the reason you stated. I guess it is time to get into hardware again. I thank you for the recommendations I will be ordering the case and PSU now to get them in an plan the transfer. I figure the graphics card can wait until I am done with that.