RE: Field Chargers..
RCKen is correct and the 2nd tower charger is much better than the first tower charger, except you can't charge a glow driver on either which is important to me, but the double vision can't do Li-polys. So it is a trade off. I have a Triton also which is an awesome product that I use for my Li-poly's, Li-ion, NiCd, NiMH and Lead acid batteries. You will more than like have more than one charger eventually as most pilots do, so I would still say have something that would be able to charge a glow driver eventually. I like to be self sufficient and have most things at the field myself that I need as far as charging.
Good luck Chad with the decision.