I have a pro-tools bead roller that I am very happy with. It is one of those tools that you may not need every day, but when you do need it, they sure make it nice. I did the electric version, but they also make it in a manual too. Electric is nice because it makes it much easier to do panels by yourself. Here's a link to the pro-tools roller: http://www.pro-tools.com/m3.htm
I'm very happy with my Mittler Bros machine. It will do a lot more than what its rated for. I abuse the hell out of mine and haven't broke it yet!!!