i've developed a mk1 MX5 as my track toy as it's easier to be a hooligan with FR. That and the fact an Elise has very expensive clams to fix if i hit something! The Elise is now road only where i enjoy superlative feel and incisive handling within its limits. It's good to have both though, quite different.
i wouldn't judge a fun/driver's car just on how quick they are. there are challenges to MR and RR that make life...interesting.
I was out in a MX5 a few weeks ago and it is a brilliant track day car with very few vices. It is also very easy to feel the weight transfer and to learn to drive it on the limit. The Elise is a very quick car but has some challenges when driven quickly. Most drivers do not use more than 50% of the cars ability so never know.