I would recommend the UCD, though I may be slightly biased

I have a Saito .91 on mine and it has very good power.

Waterfalls, walls, blenders and flatspins are great. Flatspins are flatter inverted than upright. Knife edge spins are great and so fast it's almost a blur.

Harriers are not the best, even with spoilerons there is a good amount of wing rock. I haven't really messed with elevators yet so I can't comment. I have heard that it elevators really well, and I've also heard that it rocks badly.

Knife edge stinks(pitches hard to the belly and rolls opposite of rudder input), I had to mix it out with my radio, and even now it's better, but not great(still tweaking though).

Hovers are easy, if I could just hold them for longer...

I really can't speak about the Funtana as I've only flown one once and didn't really do much with it. I think that the UCD would be a little better choice for a first 3D airplane because it is more forgiving. True it's not the best looking, but you're trying to learn, not win a beauty contest. I was able to get my UCD for about 30 bucks less than the Funtana 40, FWIW.

I'd pass on the Flip due to the price. I really don't know anything about it, either.