Rebuilding a few boxes

I plan on rebuilding 2 if not 3 of my boxes in the next few days.  I plan on putting a 160 gig seagate into the athlon 1700 and then build a fc6.  The intel 1 gig I will either put fc6 or go to ubuntu edgy, I am not sure what one I want to run.  My 2003 box is getting pretty old.  I may rebuild that box in the next month.  I have to decide what I want to put on that.