I just went from a Storm2 to a Dinc2 about 6 weeks ago. You won't be sorry!
I get about the same battery life as my Storm2 with so many other benefits: better screen, better camera, better form factor and weight, faster all around, excellent web browsing, apps galore, etc.
I miss some of the BES features for my company Exchange account like tasks, but you can get most of those back with Touchdown. I did not install Touchdown as I wanted everything integrated. My email, calendar and contacts work just fine.
Spend some time reading the article for those coming from a BlackBerry to an Android phone. It helps.
I will advise you to check out different keyboards if you miss the Storm2 keyboard. I used SureType, and for a while I used HTC's version of the two letter per key keyboard. I have since gone to Swiftkey X, and won't got back. I type much faster and more accurate than on my Storm2 for sure.
Good luck!