RE: Need your advice please.
CheeseNeggs,
It sounds as if your mind is made up. You asked for advise, and are questioning the advise that these experienced flyers are giving you. If you want to spend your money on a jet, then have at it. I hope that this is the only model airplane that you will ever destroy. (something tells me that it won't be) Be prepared to pick up the pieces. Take a large plastic trash bag to the flying field with you. It's considered bad manners to leave that much trash and junk scattered and lying about.
When experienced modellers tell you that you need to buy a trainer, and seek the help from a qualified instructor, then you might wish to listen. That advise is free. Wadding up a model airplane is not. Trust me, you will destroy this model, and probably any of the 3-D models that you listed. You need to master the basics of a full function model airplane before you try advanced models or aerobatics. If you won't follow the advise of those who cared enough to answer your post, then do what you wish. It goes with being 15 years old. You will understand that in about 20 or so years.
Best of luck to you. (look for a well paying job, I think you are going to need one)
Bill, AMa 4720
WACO Brotherhood #1