Well, just FYI, not all of us are ok with flushing cat litter (even those that are flushable), those of us especially that live near waterways are advised not to do so:
Cat Litter: Is It 'Green' If You Flush It? - AOL
Pet Waste--Seattle Public Utilities
Best to check with your local area, though.
OP, I've used Premium kitty litter just recently, the granules were very fine, brownish grey. I didn't like it because it was very dusty and caused litter to scatter everywhere in my small apartment. Didn't like finding cat litter in the very far corners of my apartment.
I've always gone back to Dr. Elsey's in the blue bag. I first purchased it from my local Petsmart, but I just didn't like lugging 40 lb bags into my small upstairs apartment--clay litter can be very heavy, so I get it delivered with Amazon or Chewy's for now.
Another brand I like is Integrity Cat litter. I have purchased the multicat version of their clumping clay, it was also very good, but only available at my local independent pet stores. Again, I don't want to carry 40 lbs of it into my house, so I went back to Dr. Elsey's due to the free deliveries from the vendors that carry it. That brand would be my alternative if I couldn't get Dr. Elsey's, litter was whitish (zeolite), and minimal dust, imho.
Haven't tried A&H, though I've been curious on that as well. I just don't want to be stuck with it for weeks of it if I don't like it is all...their reviews are always mixed.