I did a little bit of research before buying mine so here's the lowdown...

OK/EZ Mustang 45, Dago Red, or Voodoo - Great flyers with an absolutely amazingly wide performance envelope. MAN did a review and gave it quite high marks. The included Supra gear are supposedly very good. Very expensive though.

World Models Mustang, Miss America, or Dago Red - Very good flyers, no bad tendencies. A little less scale with wing length ailerons, but that's made up for by excellent lightweight construction and great iron-on covering. I've had the priv to see this model fly and it's quite nice. Isn't able to slow down (well without stalling) as well as the EZ or Kyosho, but then again you woulda bought a fun fly if you wanted to go slow. The included WM retracts are good to adequate depending on whether or not you fly off grass. Reasonably priced.

Great Planes Mustang ARF - How in the world did GP, who makes an excellent kit with a wing based on the same airfoil as the Kaos, screw the ARF up? Well they put on a bunch of weight and a completely different wing. I've handled this plane and even with fixed gear it's heavy. It's also pretty non-scale looking, the fuselage looks way fat, and the plastic cowl/spinner look giant sized. Flies OK with a 46 2C, better with a 70 4C, and best with a 60 2C. Keep the speed up, it likes to dip a wing when it stalls. No retracts included. Same price as others that come with retracts.

Kyosho Mustang - Light is the best word to describe this model (and all the Kyosho warbirds from what I've read). I bought this plane. Equipped with a 46 2C, 6 servos, and DBP mechanical retracts, it weighs in at 5.5lbs dry. Without the retracts, this model could easily have been 5.25lbs or lighter, which probably makes it the lightest 40 sized Mustang around. Semi-symmetrical airfoil and light wing loading means that this model is probably second only to the EZ in terms of flight characteristic. Mine can knife without loosing altitude! Flies a lot like a pattern, but slows down very nice. Looks awesome with the retracts up. Major problem with this model is that the covering is sticky backed and in the sun/heat begins to resemble a bulldog wrinkle and all. Doesn't seem to effect the performance, but looks like absolute sh*t. For $169, we should get iron on. No retracts included. Wait for this model to go on Tower's inventory reduction again, they went down to $124 the last time around.

VQ Mustang both B and D models - Big yipee for B admirers. I believe the only manufacturer to offer a B ARF. VQ is made in Vietnam and had questionable quality in the past, but I've read that they've overcome some of the their past shortcomings. I believe that they are covered with sticky backed film and retract quality (probably Supra clones) will not be as good as the others.

VMAR Mustang - If their measurements are right, I'd stick a 60 in this model. A bit too big and heavy for a 46. Not too much feedback to be found about this model.

Modeltech Mustang - Wildcard of the group, not too many people have posted feedback regarding this model. I'm guessing that it's still just a bit too early (all the others have been out for over a year). Looks good and covered with real iron on film. The included retracts and aluminum spinner are a plus.

As you've already read, I wound up with the Kyosho. I got it during one of Tower's inventory reduction sales and wound up getting the model for $124 - $15 coupon (yes I did buy a couple of other things to break $150), so it was more a $$$ thing than anything else. But I'm happy with my purchase. I've got 5 flights on mine and the plane performs very well. Landings are about as slow as my Avistar (not quite as slow as my Uproar), and the DBP retracts (designed for up to 60 sized planes), have held up very well even though I fly off of grass. But if I had to do it all over again, I probably would pick up a WM Miss America. The color scheme on any warbird paint scheme Mustang is not all that good in the air, which isn't so good when you have a 40 sized model capable of 80+ mph...

Hope this helps!