I was going to suggest the 4/4 75th Anniversay model, too.
The alternative would be the 4/4 Sport with Omex kit. Gives a useful increase in power & torque, with no reduction in fuel consumption or increase in road tax...
Being a Lotus owner, you'll be used to revving the motor - so the Sport with added zoom might be right.
As Dave said - try as many as you can!

Cheers,