The AC/DC chargers are pretty much limited to 100watts, with most being 50watts. Thats good enough to do a full 1C charge on a 2S ipo up to almost 6000mah (5952 to be exact), but forget doing a 2C or 3C charge with 50watts. Theres a big price bump jumping to 100 watts, more than doubles, but partly because currently there's really only one 100watt player, Dynamite.

If you're going to run lipo and move to higher cell counts or take advantage oif higher C rate charging, you need a powerful DC charger. I just popped for a 1000watt capable charger.