No need to add guns to the -C model. That just screws up balances for early war setups/scenarios.
I'd much rather just have the J model added on top of what we already have.
For one, I would love to have that extra pair of tail guns in MA flying, but the biggest thing I'd love would be a 12-gun nose! (yeah, yeah, no guarantee we'd get a strafer model, but either way I'd be happy with SOME sort of J-model)