I have tried a few others, but I am hooked on Pish Pads. They are the best I've found, much better than Pooch Pads IMO.
http://www.pishpad.com/
You can buy the pads individually, but I bought a roll and cut it into pads as it was much cheaper. It was a big investment (over $100) but I was spending about $40 a month on disposables.