I'm waiting for hobbypartz to get some more stock on gens ace and I'll order one of those to try it out. Also thinking about getting a scooter motorworks since they're so lightweight, someone at my local track recommended them to me, but they're nowhere near as affordable as the gens ace or turnigy packs. So far I'm pretty happy with my Common Sense RC pack, but it was $65 and not ROAR approved so I'm not sure I'd buy another one.