Kyosho? Great little 40 size AT-6 ... just hope you never need replacement parts because IF they are available, they are VERY expensive. How about a wing set for $10 less than the total cost of the ARF?
Hanger9? Again, a great 60 size AT-6 ... as long as you have the money to go with the bigger engine and the extra bucks for a good retract servo. Plus you'll have to deal with the factory "wobbley" retracts or spend the money to put in some good replacements.
GreatPlane? Again and again, a great little 40 size AT-6. Put a cheap OS 46AX or a Saito 72 or 82 and standard servos with fixed gear and you have a great "beater". For the money, this is your best bet. They all fly great and they all land like a Texan. For your first warbird? Maybe the Hanger9 T34 Mentor? I don't know. Any warbird is going to land "hotter" than most other planes. Taildragger, maybe the Texan. Trike, maybe the Mentor.
For those that prefer a dead nuts, scale AT-6 like Cyclic requires, you had better not start with an ARF anyway. Get you a great set of plans, get one of the laser cutters to cut you parts ... and spend the next 12 to 18 months to reproduce a warbird worthy of the full scale original. But personally, I love all of my non-scale, non-worthy birds

But maybe I should sell them since they are such crappy representations