How times have changed. It wasn't long ago the F15 and F16 were highly recommended as first jets. They are very easy to fly.
The new generation of trainer jets are very easy to fly but honestly in my opinion outside of teaching you turbine operation do very little to prepare you for any other type of jet. In fact I have seen them be detrimental when a pilot is very used to the trainer jet. They then go to a scale or sport jet with that subconscious expectation that they will fly much the same.
back in the late 90's/early 2000's when many of us started, if you weren't already flying ic ducted fans, you started with an F15, F16, Bandit, Kangaroo, Hotspot, CAI Raptor, cyclone or a converted ducted fan. Of all of those the 15 and 16 were probably the 2 easiest landing jets.
I started with a kangaroo and Ram 750 after flying mostly pattern. I had a couple of ducted fans prior as well. Outside of learning how to operate the turbine (which back then was still very easy but rocket science compared to today's engines) the flying was really no different than any ducted fan or even deadstick landing (lack of propwash). The engines back then took forever to spool up and down.

I had to learn most of turbine modeling on my own with the exception of a bazillion phone calls to dean wichmann. I think I had the 3rd turbine in Canada and the only one in alberta at the time. Outside of RAM engines blowing up left right and center I never had any real issues with turbine. Ram just about made me leave the hobby after having 2 fresh factory rebuilds blow up again on the same day. Back then a ram750 was near 5k Canadian. I moved on to an AMT and then the (at the time brand new) pst and had much better luck. Now 19 years later I still fly those old AMT's, a very old jetcat and one pst600. I've had many other engines and can say honestly that turbine modeling has never been more affordable or more reliable than it is right now. If you are experienced and have help from other key guys in your area then get your F15 and have fun. The extreme jets version is great. Don't waste your money on fly eagle jets garbage. Put a kingtech engine in it and fly the crap out of it. I can't comment on electric gear as I've never used it never had pneumatic fail on me either.
Buy the jet you love. I recently bought a reaction 54 for my dad to fly but it is not a jet that excites me in any way. The F15 is a good choice provided you have good flying experience.