I got an Antec Sonata case:
I'm thinking of removing the harddrive tray thingy and make a hole in the bottom of the case for the heatercore and fan(s). Then add a reservoir to the top of the case, like an Aquatube or something home made.
The slickest layout would be to have a T-line in the hose going to the CPU block and not having a reservoir, but I'm not sure how messy filling/bleeding a T-line is in the long run.
I'm open to suggestions!