Best 2D/3D iPhone Game Engines

[zaca]

What is the best 2D or 3D game engine, and why?

So far this is what I have heard, but I have never used either:
2D: Cocos2D (open source)
3D: Unity (US$600)

I have a game that I want to develop (2D) this year, and I have a few 2D and 3D game ideas that I want to pursue for next year. I think this info would be valuable for a lot of people.

[FlagellumDei]

SIO2 is a great 3D engine with Blender support (open source and/or indie license)

ShiVa seems that it's a good 3D engine with a great editor (commercial)

Ogre 3D engine has an iPhone port too, which seems pretty stable (open source)

[bpatters]

Originally Posted by zaca

What is the best 2D or 3D game engine, and why?

So far this is what I have heard, but I have never used either:
2D: Cocos2D (open source)
3D: Unity (US$600)

I have a game that I want to develop (2D) this year, and I have a few 2D and 3D game ideas that I want to pursue for next year. I think this info would be valuable for a lot of people.

If tooling is important to you, and you know C++, then I'd strongly recommend iTGB from Garage Games. It's got it's quirks like other game engines but it's really easy to develop 2d games with. Since you get source code with the purchase ($750 total) your pretty much have free reign to do anything you want with your game.

I wrote Kingdom of Gorath using it. The Kingdom of Gorath