I really want an extended life battery that will fit in the stock housing - I'm much more interested in a battery that will work w/my existing Pearl body/case, etc., and not feel bulky in my pocket. I will definitely buy that. A battery that requires a different back, cases, and makes the Pearl bulkier would be of less interest to me.
I guess what I'm saying is, for me, stock sized enhanced battery - Must! Larger sized battery - not so much.