Oh so do I! I really like to put walnuts and dried cherries on it as well, and use a raspberry walnut vinegarette. Mmmmmm!
I find Danish blue cheese to be good for crumbling. I don't have a specific brand to give you unfortunately, because I just look for where it comes from! But, where it comes from can tell you a lot about what it's texture might be like. Danish blue is also a bit salty, which I like.

Another one that's good for crumbling is Roquefort.
Gorgonzola is generally supposed to be crumbly, but I have found some brands of it to be creamy, almost like brie so you probably should look for it as a brick of cheese rather than in a little wedge-shaped tub if you want it crumbly.
I'm sorry I don't have any brands to offer, but I sure do love cheese. Hopefully someone else will have something more specific. Now I think I might have to go buy some!
