I'd skip the full cover GPU waterblocks. They inhibit flow too much, and GDDR3 memory really doesn't need that much to keep cool. Passive air heatsinks will do just fine.
For a CPU waterblock this should do just fine:
http://www.performance-pcs.com/catal...oducts_id=3349
Even Cather said that there wasn't a substantial gain in the G7 over this design. As for a GPU waterblock, look here:
http://www.cooltechnica.com/Merchant...egory_Code=VCW
This could be the best GPU waterblock out there right now. (Though I should note this is only based on observational data not empirical data).
I'd say do one loop with a BIP 3 or 2 PA160s. The later will be very difficult to fit into one case. You could potentially get two BIP 3s into one of the cases I showed you.
Pumps: If you want to keep it simple, go with a D5. If you want it to be ultra reliable, go with an Iwaki. Stick with barbed fittings and clamps, the tried and true method (certain wbs don't have the room for compression fittings).