That Rocco is massively overpriced, you can get new Rocco Rs for that if you shop around. Also, the bit about the Golf R not being available until they've x-orders is horsesh*t, you can order one today.
The Rocco out of the box though is way quicker than the GTI. The new engine is better, remaps better (stage 1 circa 260 instead of 245/stage 2 300 instead of 270), the chassis is better, it's lighter with lower centre of gravity etc etc.. all it needs is brakes, they're toss!
VAG dealers are being absolute jokers with anything rare-ish, because people are paying daft money for them and they know it.
Keep your Clio, pick up a 320D on a private plate for work duties, job done.
Otherwise, you could buy my DSG GTI..