I have a similar setup with a sump. You can also go with 2 canisters, or even a single big canister like an FX5. Make sure that host lengths are identical if you go with a single canister setup, to get even pressure/flow.
If you do a chiclid tank, sump should be a no brainer. If you go with planted and injected Co2, Co2 escape is a small issue to deal with.
NIKON pimp #017
Sump pimp #014