Today's high C rated lipos are capable at being charged/discharged at very high current (amp) rates. For someone that has several batteries to run this is not as important, but if you're getting into racing (or even thinking about it) I would suggest a charger such as this with the capability and features you will need.

I've had a 308 Duo for over a year now and have had no issues. There are several capabilities the 308 has that you will not find in the 106B. Also the information is much easier to see with the larger display. Combine that with the capability to charger two different packs individually at the same time.

I wish you good luck in finding a charger that meets your needs.