Dave, the resident Tweakers Asylum Detonator Driver guy has taken an in depth look at the Omega Detonator Drivers and what exactly makes them tick. Here are a few details:
"This write-up began as a simple exercise of benchmarking the Omega drivers for the Detonator Database. I originally intended to collect my data and let that be the end of the story but while I was running the benchmarks I began to see some disturbing visual behavior from drivers that were supposedly optimized for "quality." A final version and a disclaimer later, the Omega drivers have seen some slight improvements but there is still the question of whether or not the drivers actually offer a significant quality advantage over the stock nVidia competition."