I have a similar conundrum. Volkswagen is literally paying me $7k more than my diesel Jetta is worth to get rid of it, so I'm totally taking them up on their offer. The question is, do I use the cash to pay for a lease for ~2 years, or get the cheapest used Civic I can afford and put the extra money towards M3 trim options?
My mind says the latter but my heart says the former.
I seriously considered the S60 2-year lease, but I just can't bring myself to put out the extra money to do it on top of what I'd be getting for my current car. So tempting though...
In the end though, I think I'm going the patient route and getting a decent $5k used car to hold me over. I'll hate every minute of driving it, but it'll be an investment in the future.