I owned and used a Dremel 5000-30000rmp model for several years until I dropped it and it broke. As a replacement I bought a Black and Decker RTX because of a few reasons...
1. I liked the form factor better for the B and D. Looks and feels better IMHO.
2. The B & D has more power as far as amps and torque.
3. The B & D will stay on a set RPM unlike my Dremel which with the sliding lever, would increase speed on its own with the vibration of the unit.
4. The B & D can be turned off and back on while keeping the dial at the preset RPM whereas the Dremel had to use the speed adjuster to dial it down to 0 RPM to cut off. This feature is helpful when you are working on something that requires a constant speed to keep results even. You can turn it off and not worry about getting the speed right when you cut it back on.
5. The B&D has a keyless chuck that is just like that on a drill, whereas the Dremel has a keyless chuck that uses one of two size collets that need to be interchanged depending on the size bit you use. This can be quite an annoyance. The B&D will automatically adjust to fit any bit. Keep in mind that any bit made by Dremel will work in the B&D and vise versa, so don't let the abundance of Dremel-made bits as opposed to the lack of B&D-made bits affect your decision. I'm still using all the bits that I had with my old Dremel.
You do need to realize that I'm comparing the model I had to the B&D, not all models. The one I had is still made and sold, but they do make one with a digital adjustment where you push a button to adjust speed, but this is probably too stepped in increments from 1-10 whereas the wheel on the B&D is true variable. You can leave the speed just above or below a specific setting if you want. I believe the digital model divides the speed from 5000 to 30000 in 10 increments which is a change of at least 2500rmp per setting. Also, the Dremel has been around for a lot longer than the B&D model, so I cannot say how long the B&D will hold up. My Dremel lasted several years before I got clumsy. Also, the bushings on the Dremel are easily changed and readily available where Dremels are sold. Also, the Dremel has more attachments available, which will surely change as the B&D becomes more popular.
Either way, you are sure to get a good tool. It will be basically personal preference. The looks and feel of the B&D is what ultimately made me get it instead of another Dremel. Just be sure to get one that is truly variable in speed with a top speed of at least 30,000 rpm. As far as the cordless, stay away from it. It is a lot slower, and only useful if you aren't working around an outlet, which you said you would be. Go to Lowes or Wal-Mart and get a feel for each model before you decide. Also, keep the receipt, as you can always change your mind and exchange it if done in a reasonable amount of time.
Mike
