Pennyless

I've always had an interest in astronomy and have owned a few scopes in years past. I built a 2 Cookbook Cameras when they where available, still have them somewhere, but at the time I did not have a mount capable of tracking accurately enough for photography. I couldn't even place any objects in the sensors field of view with the equipment I had. I had one lucky shot of M13 that I could never duplicate. My wife recently bought me a Celestron 130 slt and and a ZWO ASI120 MM-S. She knows my interest in astronomy and wanted to surprise me. Her heart was in the right place and I will always love any gifts from her, we have been married for over 35 years, but we all know this is far from a useful beginning setup. Anyway, the first item I think I need to upgrade is the mount. I can probably spend about $2000.00 without having to hide anything from my wife. I've looked at the AVX, SW EQ35, and the iOptron 25EC, I'm leaning toward the iOptron, it is supposed to be capable of longer unguided shots than any other mount in it's price class. I see that most people here seem to like SW. What is the difference between the various Sky Watcher Mounts I see here the HEQ5 Pro, EQ6R, EQ5 ect… I am interested in DSO

It is rated to carry 30lbs. I've been considering buying one, but their are so my choices I'm just not sure which mount would be best for beginning photography. The Sky Watcher EQ35 is in the same price range and some people say it is excellent. Going to keep reading and looking before I buy. I live in rural Texas and my backyard has very dark black skies. The visible stars are just amazing