I don't want to mod it to be honest. I don't have time to search for a silent 60mm and 40 > 60mm, and to mod it. Watercooling is too expensive (only eheim 1048 is truely silent in my humble opinion), and costs too much time if you want to to it perfectly.

Does anyone have any experience with VIA Epia + linux?

some reading stuff:
http://forums.gentoo.org/viewtopic.p...highlight=epia
http://forums.gentoo.org/viewtopic.p...highlight=epia
http://forums.gentoo.org/viewtopic.p...highlight=epia
http://forums.gentoo.org/viewtopic.p...highlight=epia
...
Just do a search on that forum for EPIA: lost of results

thanks for the links!

EPIA is micro ATX, mini ATX is just a bit bigger.
asus and tyan have some nice mini ATX mobo's.
they accept normal P4's, with all advantages that brings :p