I normally use Feline Pine or some other type similar. I was at Pet Supplies Plus the other day and saw this huge bag of Cedarific Soft Cat Litter. It's very soft, scoopable and absorbs all odors.
I used to have 3 litterboxes. Then I switched to deep, long rubbermaid bins (2). I have them both in my bedroom since my apt is so small. I gotta tell ya, this stuff is AWESOME!!!!! I smell NOTHING!!!!! It lasts a long time too!