Black Ice Pro III = $60
http://www.petrastechshop.com/hwlablicegts1.html
Laing DDC w/ Petra's DDCT-01 Top = $100
http://www.petrastechshop.com/laddcwpeddto.html
White Water = $35
http://www.petrastechshop.com/aqwhwaliedun.html
Maze 4 SLI (2 of them) = $45 x 2 = $90
http://www.petrastechshop.com/q.html
Yate-Loon 120mm fans (4 of them) = $20
http://www.petrastechshop.com/12yalod1cafa1.html
2 Packs of RAMsinks = $28
http://www.petrastechshop.com/evncorapof8.html
15 feet of 7/16" ID Masterkleer PVC = $4.90
http://www.petrastechshop.com/7id5odmagepu.html
1/2" Tee = $2
http://www.petrastechshop.com/1odtf1and7id.html
Whatever Additive you prefer = $5
http://www.petrastechshop.com/wacoac.html
Fillport = $12
http://www.petrastechshop.com/dadendefi.html
Total = $357 + shipping
To use 7/16" ID tubing on 1/2" barbs simply have a pot of really hot water near by and dip the ends of the tubing into it, then slide the end onto your barbs. You won't need to use clamps with it.
You will also need some #6-32 standoffs, spacers, and hex nuts to mount the 3x120mm radiator spaced off the top of your case. With the radiator mounted outside the case the only part you need to find space for inside is the pump.