Brand of OC and place to purchase?

I've read the thread about Fog vs Spray, but I haven't seen a thread about actual brand or where everyone buys.

I'm thinking Fox 5dot3. Thoughts?

I do find it curious that in one place I see that 2 million scoville units is the maximum allowed by law, and that you should get a 15% solution. Then I see the 5.3 million scoville unit Fox. If 2 million is the maximum allowed by law, then what's up with 5.3? And it's only a 2% solution?

Also, anyone know what the other 98% is?

There seems to be 100's of places online to buy OC. I can't seem to find anything on a reputable place. Any hints?

Thanks!

Greg