It's always the way! Get a quick car, want a faster car, get the faster car, want an even faster car... etc. We'd never stop if money was no object!
Stick with the mk6 mate, it's just as sporty looking as the mk5 to me. I actually find the mk7 R a little bland visually, and I see so many on the road (majority leased). Mk5/6/7 GTIs though seem much less common round my way.