I think your mad nowhereboy.
Not for wanting a change, or for wanting the VXR Corsa, ...but just because you know the new CTR is what you want, you need to (want to) save cash and that's what you choose.
Seriously I'd buy something like an old £1K-£1500 run about, possibly a 1.4 and then seriously start saving some cash.
That way you'll have a nice lump ready for next year, really appreciate the difference in performance and not lose too much cash getting rid of the run about.