I use a Wacom Graphire3. Comes with a wireless mouse and pen. I like it and use the pen most of the time. However, with the pen you lose the wheel (for pan and zoom) which was unacceptable to me. So, I also use a Nostromo n52 Speedpad by Belkin. This device is for the left hand, has the wheel and several programmable keys. That's my preference.
Steve
AC19(9001), 27" iMac i7, 12 gb ram, ATI Radeon HD 4850 512mb, OS 10.12.6