RE: Which Ultimate?
I've got the World Models 40S that's marketed as a 46 size. It's EXCELLENT!!!
It's so good, in fact, that it's caused me to rethink my plan to stick with 46size models exclusively. And I've been looking at their 120S. If it's the quality of the 40S, it'll be a good one. I figure with an OS120AX it'll be just as awesome.
The kit was quality throughout. The design was very, very good. The construction was the best I've seen in an ARF. The thing flies as good as it looks. It looks great.