Re: Good MOBO in a Dell?
Dells use dspecialised PSU. So, if you upgrade mobo, you must upgrade PSU.
As for the case, if this is a metal palette, maybe it is unscrewable or if you wiggle with it a bit, it will come off.
If not, make a big rectangle cut along the mobo outputs...not PCI. Then, you can slap the newer one.
Another thing I would consider is the ATX screws. Are they all well placed to fit newer mobos?