R4I SDHC

I'm running an R4I SDHC (compatable with the 1.4.1 fw) and I'm wondering what FW is the best to be running on it? I'm currently using the standard one.

I own a TTDS card. I don't know much about R4s but you'll be able to find what your looking for here - http://filetrip.net/c1526-R4-series.html