I have tried, "Elite 10.1" and "Android Open Kang Project - galaxysmtd - Build 32". They are arguably the best AOSP and AOKP roms available.
Elite 10.1 - http://xdaforums.com/showthread.php?t=1575683
Android Open Kang Project - http://xdaforums.com/showthread.php?t=1524108
I haven't tried the iMobile on my phone, but the other applications from playstore work absolutely fine. Have not faced low memory error either.Did you face any issue with the availability of apps in playStore with these roms ? I tried CM9 & slim ics but appstore did not show me iMobile (icici bank india mobile app). When I re installed from my backup, it did not work. I also faced low memory error with CM9 and slim ics.