Which framework for Stage3D appears to be best for mobile so far? (iOS and Android)

Has anyone done testing with the various 3d frameworks on mobile devices? I know starling runs pretty well. I've tried Away3D, Flare3D and Alternativa3D so far and I find the beginner tutorials to be very approachable, although all the engines are scrambling to get Stage3D support in now. Away3D Beta 4 has almost no tutorials online. Flare3D has some good tutorials. Alternativa3D looks great as well as good samples and documentation.

What I'm struggling with is finding a complete solution. I have 3dsmax 2009 which is too old for the plugins (like Flare3D) and downloading the 2012 trial refuses to install a 32bit version in my 64bit OS, so I can't even use their exporter. Alternativa3D also has max plugins but don't work very well for me. Even exporting basic OBJ files has proved to have significant limitations, like no UVWMap useful info being imported (such as tiling materials).

So I'm wondering overall what a good mobile strategy is. Which framework looks most promising with Stage3D and what 3d apps I should expect to need with it.

Thanks for any info!

edit:

Just a note regarding 3ds max 2012, you can actually install the 32bit version even though it no longer asks you. After decompression of the installer, run the Setup32.exe and it will install the 32bit version of max. The Flare3D plugin works now