Thanks for all the links - a big round of applause to everyone at Pro/Cooling!!!
Ruiner: I am aware of the DDC pump but I have a very tight budget.
DeadEye: A new CPU

- again I would love one, but

no money...
psychofunk: I think I can actually squeeze in a res (have to take a few measurements to be sure).
I am saving my money for an upgrade of my main rig - I have a PIII 1.2GHz, and I am saving for an A64 3500, Nforce4 mobo, 1 GB RAM, 6800GT, DVD burner and a 500W PSU. So all other projects get very little funding and the HTPC has already cost more than I planned to spend.