Of the three options, I would own a Jetcat, consider an Evojet, and not own a Jet Central, personal reasons on the Jet Central issue.

However, I have owned 15 or so turbines, one was a Jetcat P120 which I sold before I ran it.
I have a G-Booster which is an unbelievable engine and I still have that engine. I have owned 1 AMT Mercury, 2 AMT AT280's, an AMT AT450, and an AMT NL Olympus. I have owned 2 RAM750's, and 4 PST's. I also have a Kingtech K80.

Depending on what size of engine you are looking for, I would look at the AMT NL engines, there is not a better engine on the market IMO. So far I am very impressed with what I've seen from Kingtech as well, I am very anxious to run a K170.

However, as I say, of the 3 you have listed, I would go with Jetcat. Bob Wilcox is a great guy to deal with (I dealt with him on my P120 which I purchased used) and the engines, while perhaps not the most state of the art, are probably one of the most reliable turbines out there.
Just my 2 cents.