No, no, no.
Start low, work your way up. You'll thank yourself in the long run because you'll be in a better position to enjoy the car.
The M5 is, virtually, a supercar. It's rare, it's exotic, it's a stunning drivers car and it's really rather special. Unfortunately, it requires somebody really rather special to drive it properly, and it requires a bank balance really rather special to run it properly.
You probably have none of this - no offence, I'm ready to put my hands up and admit I don't either.
Get yourself something reasonable, run around in it for a year, then start climbing that ladder.
Grab a years NCB in a Focus 1.6 or something, and then you move to a 523i or something, and then finally, when you've got the cash and the experience and a tad more restraint (It's an age thing, even I do it sometimes) you can buy an M5 and own and run it properly.
I'd love to suggest an RSAP Mondeo instead given it still looks like a sporty saloon, still has a nice interior, has a reasonably amount of power but has neutral handling, but I'd get lynched so we'll leave it at the Focus
I know what its like to want one - but I've said 'When im 25' before I get mine
Ok, loads of people will now come in and say OMG you can easily kill yourself in a Corsa, OMG i had a 500bhp Sierra RS500 when I was 17 and I didn't die, etc etc but the facts are against you - young + power invariably leads to problems. Heck, I had to think hard about whether I was ready for a 530i and I'm 22...
Yes, people here HAVE had powerful RWD cars soon after passing but the fact more than half of them have subsequently stacked them in some sort of oversteer related incident is rather telling
