I'm picking up the batteries later this week. They're being built right now. So I'm still shopping for a BMS.
As for the DIY arduino route, I think I'm willing to give it a try. I'll need some help with the programming for sure. But right now I'm gathering the shopping list. Can anyone add or critique this list please?
Arduino UNO R3 board with DIP ATmega328P
http://amazon.com/dp/B006H06TVG/ref=...I32ZH51Q6FUHPD
Amerlight TM LCD Module for Arduino 20 x 4, Black on Green, based on the popular HD44780 controller
http://amazon.com/dp/B00FMTC0KC/ref=...FB1M53TU&psc=1
Mux Shield
http://www.amazon.com/SparkFun-Mux-S...rds=mux+shield