I wont repeat what has been said about the rad (in my opinion the BIX is overrated).
DDen waterblocks are excellent and all copper.
You will NOT want an innovatek HD block, because it's made out of aluminium ! You will kill your copper waterblocks. Besides DDen blocks are in 1/2", innovatek is in 3/8"... you should go all 1/2" (try Tygon

)
For a copper HD block (one is enough for 2 HDs, sandwich them and put foam around) try D-Tek at dtekcustoms.com .
(edit) You'll also want a fanless PSU, if price is not a problem...
http://www.siliconacoustics.com/tkpow300wfan.html