X what everyone else has been saying about Dremel.
For $128 you'll get the kit with the flexi shaft, which is well worth it. As Muzza said, go corded for occasional use if it's not heavy work.
I used to use mine for cutting out striker plates in ali door jambs, so I went corded (I've got the $128 kit) as it was getting loaded up pretty hard.
Forget cheaper accessory kits. I got one of those 'Zone' 100pc kits from Aldi for $15-$20, the cutting discs lasted all of 3 seconds and the sanding drums fly apart when they touch something.
Dremel parts are too bad on price, at least compared to Fein Multitool accessories.