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I'd recommend the TDX. It is around the RBX and WW but only has two hoses to connect. You can get the A64 top that goes on it.
I would recommend researching water cooling and building your own setup. The koolance exos runs on 1/4"ID tubing from what I understand. The TDX typically runs on 1/2"ID tubing.. sometimes 3/8ID tubing.
I think 2fresh has some nice heatercores.. bonnevill 77 with shroud and fans for around 50. An all around decent pump is the eheim 1250 but it is a monster... the mag3 is good but requires modification... and the swifty pump is nice. You can pick up a bay res for around 30 or just use a T section for filling.
I just think surfing the h2o forums and reading stickies will really help you out.
Some good websites are dtekcustoms, dangerden, cooltechnica, xoxide. I bought most of my stuff at dangerden and on the anandtech forums.