Okaaayy...
With such a good looking installation I understand if Your´e hesitant to tear it out and start all over. And if flow resistance ins´t an issue, well, go ahead.
2 BIMs have almost the surface area of a single BIX.
For the moment I have an oversized Zalman passive heatsink for the north bridge, running 146 MHz FSB, hasn´t failed me yet. Still I strongly believe in water cooling everything that´s overclocked, so my plans for this autumn includes an NB WB (bragging rights

). I do plan to go higher than 146 MHz.
regards
Mikael S.