I've been using a 510 for a while now, and would like to upgrade to a mod that is still fitted for the 510 atties. The main things I'm looking for is battery life and size. I really don't want anything big(like the Chuck as nice as it is). Something around the size of the ego would be great(I don't want an ego though, non proprietary batts only). I don't need high voltage, that's what lr's are for. I'd like something in the 900+ mah range for times between charges. Oh yeah, its gotta look nice too. Preferably around 100 bucks or less, but a little more is not a big deal. Quality is important!