Arnage - 6 Speed or 4 Speed?

[spyker138]

I've happily owned an Arnage Red Label for seven years. I absolutely love it. However now the Mulsanne is about and the prices for late Arnages are dropping I'm becoming tempted to upgrade to one of the 2007-on versions. Has anyone got driving experience with the newer ones to tell me if the 500bhp, six speeds, etc etc is worth going for? I actually find the combination of the old four speed gearbox with the torque of the old single turbo engine great fun - will I want the newer one or will it be more of a sewing machine (like my GT Speed?).