I definely agree with Redleader. Don't go Z3.
Get yourself a Maze 2 with 1/2" barbs, 7 or so feet of silicon tubing in 1/2" and possibly the eheim 1250 pump (you'll also need the 5/8" to 1/2" kit for the inlet on this pump) from
www.dangerden.com.
Then for rads get the D-tek Cooler core (just like the Big Momma, but cheaper and has 1/2" fittings, oh ya it is full copper, just painted silver) at
http://dtekcustoms.safeshopper.com/7/24.htm?901
Another option for pumps (what I'm using as local suppliers and shippig sucks to Canada) is the Danner Mag-Drive #3 - 350gph. 1/2" barbs screw right in (one mail, one female). It's cheaper than the eheim, pumps as good and very silent (but I hear Eheim's are the most silent and reliable, these aren't far behind)
Condensation won't form if you just water cool (without the peltier) as nothing ever goes below room temperature. I'd start with basic water cooling, then if you feel the need move up to a peltier when you know more about what needs to be done for condensation (it's a whole 'nother art!!!)