re: Which Dremel Tool to get?

Depends what you plan to use it for. I use mine for minor things around the house, and I love having cordless. It's surprisingly powerful for what I've used it on - grinding cast iron, cutting screws, shaving hinges, smoothing out rough edges of wood and metal furniture. I've never used it on full power for more than 15 minutes solid, but I've never even come close to the battery dying.