i need a fast prop plane
you need to learn to build to a high standard, most jets, even the artf ones still need some finishing to very high standards, you are gonna be doing 200+ after all..
had another thought why the small Magnum isn't a good jet trainer.. most jets are large so don't get away from you like the Magnum can.
i can't give an engine size as it's a US kit not UK and i know very little about it, largest in the range is normaly a good bet.
don't forget after you've test flown and got used to it, to add the servo slow to throttle.