Yes you're correct Dan, and I largely agree with your comment about only needing 3 cars. But as the OP asked for 10...
I would add though that I would imagine (hope?) that the cars that are similar to each other in my list (e.g. F1, Zonda and F50) still have their own unique character and are different enough to drive that I could enjoy each for what they are.
I stand by the MX5 - it's not a question of how capable it is, more that I wouldn't be that put out if I backed it through a hedge (relatively speaking).