I have been a lurker here for a while, and most of the stuff I've figured out on my own: I found a radiator that would fit my case on e-bay, water blocks from Danger Den (I read about them on PC cooling a while back or something like that) , hose from EVCO, eheim pump from danger den... etc. I'm still putting things together now, and having fun doing it. I probably could've been done a long time ago had I bought everything as a complete kit... but I'm in it for the fun of it, not so much to just do it because I can.
Not sure if that makes sense. Maybe I should use beer for coolant...hmm...
The swiftech kit is a little pricey, but if you know which parts you need, you can get everything together and have a sweet setup with good waterblocks and quality components for a little less $$.
-ben