Yeah in theory thats nice, in practice its crap ( been driving a bit in a friends chipped A3 2.0TDI (170hp, and more torque than the Z) so I know what i m talking about ). But that s off topic.
On topic:
As others suggested, wait how things turn out. If your budget is correct and you wait 6 months, that will be some extra pounds in the bank you can use on a car. If you dont wait and your expenses go up, you are in a bit of trouble