Just to follow up - I got the cobb since it was $200+ less - and - i couldn't be happier!
It has been really easy to use and I have a killer street tune going now with my MAF calibrated for my custom intake, adjusted vtec, ignition timing, new throttle tables, launch control, custom rev limit, tweaked the idle, got rid of rev hang, adjusted my speedo... I haven't even gotten into my cam phasing or had any dyno time - i can't wait!
I've read up on the hondata, but i still haven't really figured out why it's better other than the obvious (support/development at cobb has ceased for honda, while hondata's entire business is built upon it..) But, either way, I'm up & running, and able to make tuning adjustments on my own and saved enough to get a header...