scalemaster90,
My hands-down favorite and recommendation for a first warbird would be the Top Flite P-47 Thunderbolt. They fly great, have excellent slow-speed manners and have real authority in the air. Either the .60-size or the 2.10-size will be fine. Just be sure to put in the retracts as warbirds look so much better with the gear up on a low pass.

Trust me, if you can fly a Stick, you can fly this Jug.
Skip the twin-engine idea for a scale subject until you've flown single-engine warbirds for a bit. While scale flight isn't necessarily hard it is different from sport flying and you'll have enough to do without having to concern yourself with two engines and a possible engine out situation.
Good luck, Bud, and let us know your decision.
Al