I've been getting the Mountain's High brand, mostly because it's cheapest ($2.50ish for a decent size container). It may be seen in this (somewhat bewildering) piece of fine art: https://sphotos-a.xx.fbcdn.net/hphotos-ash3/p480x480/551892_...

I just get the normal kind, I don't like low-fat or non-fat versions of pretty much anything. I get store brand granola for $2-3 a box to put on it, and will occasionally add a tiny bit of honey if I feel like something faintly sweetened.