Whats the water temp difference between the coolant coming in and leaving...about 0.5c? If that much..Water is more efficient than you think
The blocks are top notch, amazing build quality. I haven't fired them up yet so I'm not sure how well they perform. I picked up this stuff from Pug of wizarddesigns.co.uk. Give him a call, good guy to deal with

And as far as price, well lets just say I could of purchased an entire entry level PC...monitor and all