I know i'm a bit late on contributing to this thread, but i can offer some info:
i have 2 of the DX true 30mW and 1 of the not-true 50mW. the true 30's are MUCH brighter and have MUCH more reliable output levels. i'm sure that there is a huge amount of variation, so my experiences might not apply to all, but i recommend the true 30 for sure
GOD DAMN
DO NOT ANYONE QUESTION DX'S IR FILTERS
THE NEWWISH CLONE LASERS DO HAVE IR FILTERS
they say they don't to cover their asses in case one doesnt'!!!!1