Well, Consumer Reports rates Behr interior paints very highly (Marquee, premium plus, and premium plus ultra the top 3 of their ratings in fact, followed by Ben Moore Aura then Clark & Kensington enamel) based on their testing (Hiding, staining, gloss changed, scrubability, smoothness, and resistance to fading, sticking, & mildew) and value.

I've used Behr many years ago and had no complaints; I used Clark & Kensington the last painting I did and liked it quite well. I've never used BM -- but I have read many posts praising the finished appearance of BM as superior to other brands, so you might want to take that into consideration.... perhaps buy a test pint from each.

For exterior (rated on durability), again, Behr Premium Plus Ultra came tops, followed by Clark & Kensington, Sherwin Williams Emerald, Behr Premium Plus,and Valspar Duramax. Ben Moore came several notches lower.