RE: I need your honest opinion.
If you can stand the weight - use 2300ma genuine A123-
and read up on em . these cells are totally UNLIKE anything you have used before .
1 they will hold a charge -on the shelf -for many months
2 they will supply all the power your setup calls for - whether or not you intended that to happen!!!!
2 you can NOT use any of the battery check devices you used for NIMH- they are worthless for these cells
5 buy a A123 charger with internal balancer .
6 learn to use it
7 get a meter which you can put in line from battery to rx- and use it faithfully when setting up your model- use an old NIMH in place of the A123 when doing the setups - these will show power problems easily- the A123 will just keep on adding power -which is what you want -after the model is setup.
Finally - these are the best cells you can buy - well worth the price if you setup the model to use them
properly