I was on the quest for the perfect cat litter also.
I tried EVERTHING!! I really like the OdorLockers and the Worlds' Best was good too. But one day I was almost outta litter and had to buy the cheap stuff. Cat's Pride is what I bought it was on sale 2 - 40# bags for $6. It really took care of the odor! It was large 'grained'. And Kylie covered her poo which she hadn't been doing. So I have been buying Tidy Cat.
I did use the crystal litter but didn't like it as well as I thought I would.
I really didn't like the clumping litter the more I used it. But if you prefer the clumping litter, Arm and Hammer Super clumping or scooping in the blue box worked really well. The clumps were really hard for easier pickup.
Some time had passed since I last changed Kylie's box well she went in there last night and it smell really really really bad! Since it was 3am I didn't feel like lugging everything around so I just poured almost a whole box of baking soda on it and shook it around then changed it this morning. It really helped with the odor. I also use Arm and Hammer litter deoderizor.