The Alesis DM10 with mesh pads is just over a grand, and has a solid number of drums on top of very good reviews. I have heard the roland is price inflated due to brand name, but I could be wrong on that. Subjectively I've never liked how the yamaha's look. Overall, E-drums are harshly going to be that you get out what you put in price wise.
Also depending on your definition of 'relatively cheap', you can get the same set with mylar heads for 850
I've been doing a lot of research and I'm going to go with this kit with the mesh heads. I'm not sure but I think I can swap in a Roland head with some finagling.
But I want to actually play with this kit before dropping a grand on it.