Hmm...I don't know much about the P4 mounting system...but I think the WW would fit w/the retention bracket still in..just notings its popularity
Dtek WW - $55
Silver HC + Necesary Fittings - $24
(or you can get a
black one)
Danner Mag 3 - $45
BayRes (fits into 5 1/4" bay) - $25
120MM fan for HC - $7.50 (w/molex connector, o/wise just bare leads for $6)
Not sure how much all the clamps and hosing would cost, but make sure for each of the items, that you get the same sized fittings, so you wouldn't need to put in adapters in areas which may reduce your flow even more.
That total comes to $156.50 bux, which leaves like 10 bux for tubing and clamps, which shouldn't be all too much. If you didn't want a heatercore (which I find unwise, unless you have some other heat exchanger) then that takes $24 off of that.
It seems like a decent setup to me, maybe someone else can find better deals
Oh ya, and its also a good idea to hunt through the classifieds (forum) for stuff, you can usually get good deals.
Good luck
Fold and Frag on
Brian