I see no real need or reason to buy all new chargers if your current ones are still working just fine. If you charge at 1C then they should both deliver 60-80 minute charge times, and since they both have balancers your lipos are being cared for as well as is possible with any charger, regardless of how fast or powerful it may be. Save your money, run what ya got
I have my doubts abouts the IMAX B5 (first one pooched, had to send it back on an RMA) and I have yet to use the new one.
I would just like to have a dual setup, that both do exactly the same thing (like have dual ICE's w/ LBA10s) or get a Hyperion Duo 3 and have my ice as backup.
Thanks for attempting to save me money, I appreciate it. After all the other things I've bought, I probably shouldn't worry about chargers right now.