Dremels are good, but I find they have limited use in a garage environment. If my OH was offering to buy me a tool, I'd go for an impact driver like the Kielder KWT-002.
Although admittedly these are quite a bit more expensive than even a top of the range Dremel, you could always try the 'Don't you think I'm worth it?' expression
If you do go for a Dremel, get a genuine one, the cheap copies really are pretty poor in comparison.
