water blocks-
dangerden maze2
get the 1/2" silicon tubing there too
Also go with the Eheim pumps- they work well and are magnetically shielded so they dont put out radiation. I recommend in the area of 250gph
Radiator- get a Danger Den Supercube or a BlackIce from
http://www.caseetc.com . Alternatively get a heater core from a car.
Few hints-
make sure the only metal touching the water is copper. If you throw aluminum in there you get galvanic corrosion- the two metals act like a battery. This corrodes the metal. So copper only.
Use water wetter. You can grab it at dangerden or caseetc. It makes the water corrosion resistant and less viscous- flows into tiny microchannels in the metal better.
A resovoir is not necessary- just put in the line (preferably right before the pump intake or at the highest point in the system) a T-junction. The flow goes along the bottom of the T and the leg leads to a 6" tube that goes up. Fill it through this, and when all the air is out fill it most of the way up the leg. Then cork or stopper the leg. Now if air gets in its cought in the leg.