Thats pretty surprising that your aluminum block performs so well. Just goes to show the waterblock theories don't beat real live testing.....
not to say anything against you, but finally running a CPU at 2ghz seems silly to me

I've got two CPUs here (originally t-bred b 2100+) at stock voltage, 2100 mhz, and my cooling probably cost less than your waterblock ($18- Thermalright AX-7, $2- NMB 18 CFM fan). Of course no doubt your temps completely own mine

43 C in a well air conditioned basement....