I've not used a tracking mount, though I have thought about one. My limited tracking experience involves using a hand operated "barn door" mount (for smaller lenses) and a Poncet tracking platform.
I've looked at some of the mounts available from Orion Telescopes
, but which one depends a lot on what lens/telescope you're using and how long you need to track for.
For solar and lunar photography you don't need a tracking mount of course. Lenses like the Genesis are a bit small and a bit short for any serious planetary work. It would be a good choice for some of the larger nebulae and clusters I guess.
If I lived in a region with darker skies, I'd probably have bought one of the Orion mounts, but I'm 25 miles from New York City, so it's not an area well suited for deep sky photography!