Ron;
I've had 3 Dremels in my life, one I've had for almost 30 yr's now that my Father had originally given me for my birthday.
Currently I have a Dremel 4000 vari-Speed habging over my area, with a working cable, it works awesome.
My older Battery Dremel is the one that gives me problems that I plan on sending back next week or so....
Like the others have stated, set your budget, and if able, go to he store and handle it a bit
Yes the 4000 is a bit heavier, and i had to buy as a replacement @ HD for like $125.00, I believe it was....
and when I bought the flex wand, I decided to try hanging it, and use it that way
I guess the best answer I have, is it depends on your budget (or deal you might see online), and your intended use for it...
Bill