MikMaxx
It really depends on your skill level.The jets are no different than any other airplane.
Switching from prop planes to jets will involve a learning curve such as familiarizing yourself with the type of power, turbine electronics and plumming, turbine lag,higher speeds, etc...
If you are new to them, it might be wise to start with a plane with a lighter wing loading and more foregiving charactoristics to ease the learning curve of the already complicated machine.
Generally Scale jets will not fall into that category.
It is cheaper to retire a sport jet and moving the hardware to a scale jet, rather than hurting your equipment on you firt jet.
Good Luck

Jason Pakfar