The Fornax tracker is really nice, and highly recommended. The power source you use for it is external, but you just buy a lithium battery pack (google it/fornax has recommendations too) and you are good to go. The only catch is, it truly depends on what you plan on capturing...i.e. you wouldn't need it for lenses under 200mm or light lenses.
Fornax is great for: 200mm f/2.8, 300 f/4, 300 f/2.8 and 1.4/2x teleconverters, Sigma 85-135 1.4 lenses, etc (lenses, usually expensive too, with some weight to them).
SA is great for nightscapes, and wide field, etc. 35mm, 100mm f/2, 200mm f/2.8, 135mm f/2, etc. This is generally a cheaper system overall.
If you're using refractors, same thing -- 50-61mm apertures for SA and 70-100mm generally would fit the Fornax better, both likely require the counterbalance system.
The only major issues you'll have with either tracker is ensuring you have appropriate balance, a sturdy system, attaining correct polar alignment, and power.
I have the Fornax and its base, but instead of the polar scope, I decided to go with the polemaster camera (bought at highpoint) and adapter through the Canadian distributor. It's a little more expensive route, but it takes five minutes and I'm ready to go. Polar scope users can also set up in the same amount of time, but it's personal preference.
Also, the astrotrak can be occasionally found used on the classifieds. That is also a good tracker to consider, similar to the Fornax.
p.s. If you order the SA from OPT, keep the tracker in your cart for a while, or look for a 5 or 10% coupon to show up in your email inbox.
Edited by DantheSpaceMan, 19 January 2021 - 07:14 PM.