If you get a good deal on one (19k and under) i would go with the c5z. I learned a lot with the two c5z i had but i think now in todays economy you can get a better deal on a c6 for your dollar spent.
Yea some kid called me recently talkin about how he was looking for someone to do a turbo upgrade on his srt-4, and said he toke it to the same dude who did my Evo, but completely described you. And you know Corey did mine.
I have 2 nice white one, very similar to this..
http://www.google.com/products/catalog?q=white+mini+fridge&oe=utf-8&client=firefox-a&hl=en&show=dd&cid=15560439217250127654&sa=title#p
and..
http://www.walmart.com/ip/Black-Decker-Nucool-1.7-cu.-ft.-Compact-Fridge-White/11016396?sourceid=1500000000000003260370&ci_src=14110944&ci_sku=11016396