If you are getting into boats, you need a charger that will charge at least up to 16 cells. I have to Duratrax Ice but it only charges up to 10 cells. I run two 8 cell packs in my Aquajet Extreme so I have to charge the packs one at a time. And that sucks. But it also does LiPo batteries and has many many functions.
Here are the ones I recommend and wish I would have bought.
1. Graupner Ultramat 25.
1 to 25 cells charge at up to 5 amps. But does not do LiPos. $150.00
2. Graupner Ultra Duo Plus 30.
1 to 30 cells and charges at up to 5 amps. It also will do up to 10 LiPo cells. $199.00
You can find these chargers at www.hobby-lobby.com
All of these chargers need a 12V DC power supply. I bought a 12V 20amp continuos power supply at Radio Shack for $99.00
You will not find a real good charger that plugs into the wall. Not that I know of.