Not sure if you guys have seen, but Swiftech have released a new waterblock, the "Swiftec Apogee Extreme", which according to Swiftec, beats out the previous Storm block by around 1oc
Available for only £30 here this block looks very promising.

Swiftec said:The APOGEE water-block succeeds our award winning MCW6000 series water-blocks with a quantum leap in performance, a universal installation design and competitive pricing resulting from economies of scale.
Using Computational Fluid Dynamics analysis, we optimized the structure -the Patent Pending Diamond Pin Matrix of our MCW55 water-block cold plate to match the thermal and physical characteristics of AMD® and Intel® latest microprocessors. In particular we took into account the trend for dual core processors which feature larger die sizes thus requiring a different treatment of the heat fluxes.
The resulting product achieves new heights in thermal performance with a lower pressure drop than that of the MCW6000 water-block which was known to be among the least restrictive high performance water-blocks on the market.
As a result the Apogee water-block may outperform our STORM model by a up to 1°C (at 100 Watts thermal load and 1.0 GPM), and further increase its lead in multiprocessor, multi-vga applications due to its low restriction characteristics as can be seen in our kit test results HERE.
Available for only £30 here this block looks very promising.