so, gonna go pump-rad-blocks-res-pump with a Danger Den RBX A64, BLX, MCP600 pump, 85% distilled 10% hyperlube 5% sanitizer, 1/2 tubing + fittings, dual 5.25 bay res. One questions though, anyone know which nozzle i should use with my RBX on a Athlon 64? I was thinking nozzle #4 (most restrictive) or nozzle #5 (impingment). And thanks for all the suggestions and info, couldnt have decided on a lot of things without all your help