Costco sells a clumping litter that many here swear by. Not a lot of help if you don't have one near you or can't access it. You might want to totally switch tactics and go for the crystal stuff (not sure how well it works). You're just meant to scoop the poo and empty every couple of weeks or something like that.
I've come to realise that cats' pee and poo react differently to different types of litter than other cats. I think it's really difficult to go by what other people's experiences are with litter, at least when it comes to smell performance. In the States, my cat used a non-clumping litter, and it worked well with his chemistry, but other owners panned it (with others saying it was the best stuff ever). Of course, it wasn't sold here, so I went for the pine stuff. It's a bit of a PITA even though, and I wouldn't suggest it for someone who wants to avoid 2-3 X a week litter changes, but for my cat, it takes care of any odours. I only wish my cat could use clumping, but he has UT problems so we avoid it.