Isometric engines

[ASWC]

In August I will be making another game for a national company. This game will be 3d isometric based and I'm gathering some info about this right now. Basically I could create my own isometric engine or use one of the free engine out there or even buy a license and use one of the commercial ones.
For those of you who worked with free or commercial ones, which one would you recommend and why?

[ASWC]

What a bummer! Nobody used some isometric library and can tell me what they thought about it?

[tadster]

I've yet to work on any isometric games. I don't think it would be too hard to build your own engine. Perhaps just grid based system mixed with pixel perfect collision detection.
There is the open source as3isolib library, that is the only one I have really even looked into, and it look rather good and simple to use.