Re: Roland vs Yamaha vs Alesis?
The Alesis is not that bad, but it's really loud. I guess people buy electronic sets for practicing at home, and the DM10 is terrible at that.
I've played both Yamaha and Roland kits (not the ones you mention, unfortunately) and I'm in love with the Rolands in general. I'd say go for a used set; for your money you can probably get a TD20, and these things can take a beating. My drum teacher uses a TD9 to teach, 8 hours a day, every day, for the last 6-7 years. He only had to replace a cymbal that broke.
Don't you have the option to try them out in a store and go with your own preference?