I'd probably go find a couple of P-38's that I could get rebuilt, so that rather than buy a plane that was already flying, I could get a couple that didn't fly back in the air.
I'd also probably pick up an AT-6, and go out and pay Steve Hinton to teach me to fly. I figure if you can afford it, there's no substitute for learning from the best.
If I had any left I wanted to spend on aircraft, I'd pick up a Baron, one of the juiced up versions (up engined, with turbochargers and the upgraded props) to fly on a regular basis (since I wouldn't want to use the P-38 as a utility plane, and it doesn't have much in the way of passenger space).