Rich, you'll love the M3 mate.
Only down side is the rasp, if you can get over that, you'll love it.
Once you up the velocity of the SMG shifts, the changes are savage!
Widescreen satnav and SMG are must's IMO to make it feel a bit more modern. The sat-navless manual cars look very dated IMO.
Once you need rear seats and a boot, with performance thrown in, it's a no brainer to me.
I'd have another in a heart beat