You stand to lose a substantial amount in depreciation on your Civic. Best for you to negate those losses and buy a used Altis AT. Not tough to find, and most probably, you'll not pay anything over at all. More like a zero value lateral upgrade.
I agree with the used car assessment, unless you don't mind stomaching the loss. Why not consider a used accord? however its low stance may make it difficult for ingress and egress.