I am a turbine waivered jet pilot for past 14 years, i have kingcats, bobcatxl (build up), comp bobcat, cermark viper jet FB tiger F16 and a few scale ships,
My thoughts on the subject are,
the turbine itself has a lot of bits and a big learning curve, if somethimg goes wrong it usually results in a fire,
The models themself really are exposed to forces like no other aspect of the hobby, chinglesh pictures leave allot to the engineering imagination,
So my vote is the Boomerang XL, turbine semi exposed to pay attention to the details, it can be powered with wide range of turbines, lite wingloading makes learning curve of turbine lag easy, then you can upsize turbine for heavy wingloading and seriuos speeds.
I learned on a kangaroo on 300' concrete home feild with 100' grass each side, I never kangarooed it, however I bounced the kingcat allot till I dialed in cg and spoilerons,
My favorite daily beater is the composite bobcat, I fly all ole school air start AMT USA with eagel tree telemetry for speed and altitude, makes for easy first time landings at new feilds, Also one of the few who will fly on days with downwind bases.
.02