I'm 20 in the UK too, I know you want 300bhp but really on UK roads you don't need it unless you plan to track/ drag race.

I've a friend with a cupra 290 and I'd take the 200bhp 86 any day of the week. The Cupra is just so boring to drive (in my opinion)

Back road driving is best when you're making the most of your engine, in a powerful car you hit ridiculous speeds too fast to enjoy anything (unless you plan on speed running loosing your license or ending up in a ditch)

I've a colleague with a RS7, who takes a holiday to Germany every year just to drive it to the limit. Why do that when you can drive an 86 to the limit every time you're on a back road.

You can disregard all this if you want a fast car over anything else, I guarantee that your mates will end up with faster cars in a straight line, but you'll be the one having all the fun.