I have to say I own a lot of Mac brushes and now have quite a few Sigma brushes and I love them just the same! SIGMA BRUSHES :: Dupe List for Mac Brushes. I have a bunch of both, and it is true, they ARE great dupes.
Makeup Brush 101: 20 Tips and Tricks On How To Clean and Use Your Makeup Brushes
While many may like this chart and like the concealer type foundation brush, I don't. I find no use for the large 'foundation brush' as shown at the top for anything other than concealer. Instead I prefer the flat top or angled flat top brushes (as seen