I recently got a Beagleboard-XM, and did a few tests to compare the performance of the DM3730 with the older OMAP3530, by running benchmarks of the mupen64plus dynarec on each. I expected that with the CPUs and RAM clocked at the same speed (500MHz/166MHz) that the DM3730 would be slightly faster due to the larger L1 cache. Surprisingly, this was not the case. There was some variation in the benchmarks between the two CPUs, but they were generally within +/- 1%. I was able to overclock the DM3730 to 1200MHz. 1300MHz resulted in random crashes. It seems I will need to recompile the X-Loader to increase the SDRAM clock, so I haven't tried that yet.