REAL Dual Li-Po Balancer-Charger

[caciqueconnection]

Hi,

In order to manage all my LiPo batts I've thought about a REAL dual charger to charge 2 x 2s 7.4v 4400 packs at 2C.

First options are:
Hyperion EOS 615i Duo3
Bantam BC8DX

¿Do they achieve the goal I mentioned?
¿Would I need an specific Power supply?

If so, suggest any other better or cheaper (Both mentioned are really expensive)

Thanks.