On the ignition you just use a switch between the battery and the ignition module to turn the power on and off.
I prefer the 123 batteries for the reciever. They run at a steady 6.6 volts, no regulator needed. You can charge them at up to ten amps and you should be able to get over 500 cycles out of them.
I have two Wildhare planes, the 100cc Extra and the 100cc Edge. You can't beat the price, quality, or the service you get from the owner Tom. He's always happy to answer any question you have. You might want to check into his package deals. I believe the package on the 88 inch Edge with the DLE 55, hardware kit, prop and spinner is about 900 dollars, pretty hard to beat!