Pop recommends this Bosch 1375A Angle Grinder for the serious minded or professional.  You can mount the Arbortech Industrial Pro Kit or Woodcarver Pro 4 Kit to this quality angle grinder straight from the package without any special adaptors.   Of course it can also be used as a standard angle grinder.

This Bosch 1375A grinder has many features including a 6amp motor, slim styling, perfect balance, and of course features the high BOSCH quality standards.  It has a 5/8" spindle.