If you have the money, I would recommend a Litter-Robot. They also sell refurbished/older models for cheaper. I have the LR3 but I think now they are on 4. It is amazing! Haven't had to scoop since we got it. It serves all 4 cats in my home just fine. For me, it was TOTALLY worth the money.
Before that though, I used those big plastic storage bins with the lid. I would cut out a big hole in the lid for my cats to enter/exit. This cut back on litter getting tracked around the house like with an open box/tray type box. Plus it offers a little more privacy.
For litter I use Dr. Elsey's! Good luck to ya!! Cats are beautiful, funny, fantastic creatures.