I've never tried airbrush foundation.  Mac tends to be very popular among Total Beauty users though. I'm personally a big fan of the Korres Wild Rose Foundation.   

Here's a recent review of foundations that we did on Total Beauty.  Good luck with your foundation search and let me know how it goes.  

http://www.totalbeauty.com/content/gallery/editors-favorite-foundations

I've recently started using light foundation this past year and I really like using it on problem areas like under my eyes, blemishes etc. Mac seems to be incredibly popular with the Total Beauty readers but I personally am a big fan of Korres Wild Rose Foundation.  http://www.korresusa.com/product/6017/foundation

Here is a recent article we did on our editors favorite foundations too (in case you want more inspiration).  http://www.totalbeauty.com/content/gallery/editors-favorite-foundations

Speaking of airbrushing - just visited a Sephora where they were featuring the new TEMPTU Airbrush Makeup System. Has anyone tried this yet? I was intrigued/ a little bit scared to test it!

This lovely little airbrush system goes for $225. You can select different inserts: foundation, highlighter, blush etc. (pretty cool!) & you can adjust coverage settings! Christmas present request? haha

See more details on the SEPHORA website