Buy a bike engined seven - there are lots available on Pistonheads for not much money. I've been thinking about one for ages to replace my Westfield
http://www.pistonheads.co.uk/sales/list.asp?p=1&s=141
There was a micra on pistonheads with a bike engine in the back, based on an autograss car I think. They also fit them to minis a lot which are mental!
If the Z was a 2nd car I wouldnt have a Z for it, they are a comprimise but I cant afford 2 cars at the moment. The Z is an excellent comprimise between a fun car and a daily driver, the Atom is not a comprimise at all.
I would love to have a go in one but suspect it would beyond my ability
the atom is like nothing i ve driven before, and ive owned 30 + cars but it quite easy to drive would be even easier if you are smaller than me (6ft3 , 16 stone ) the power is immense through the gears , if you can get the chance to drive one i would highly recommend it , automotive heaven in my eyes