I like my old ass dremmel thats been kind to us for years! that with a flex shaft to keep the dust away from the electrics, cutting with perma-grit tungsten carbide coated disks.
For detail and corners, I use the dremmel diamond xmas tree shaped grinder.
good ventilation is also key.
I saw that perma grit make jigsaw blades too, will pick some up soon.
cheers