An MX5 is something I've considered in the past however i instantly remembered 1, i am a bloke and 2 i don't cut people's hair! (joke) The fact remains that the HP has twice the seating capacity and is way more practical, plus I've always had small cars and always loved them (even though being 6ft tall it can be a squeeze at times) I dunno, I've got a month or two before i make my final decision but it's top of the list at the moment. Besides you're supposed to be defending it as you've got one!
Know what you are saying, but you've got the MJ for the practical stuff when you need to ship people around. I had a 2 seater MR2 for 5 years (3 of them) I also had a brand new MX5 in 2004. I never struggled with the 2 seater issue.
I would defend it, but never as a 'weekend/fun' type car. Whilst the 100hp is fun to drive, there are other cars that are a lot more fun for the money if i'm honest. If I didn't have the Integra I wouldn't be happy just with the 100hp, not really. Especially so when there are so many other options open to you.
Anyways have a think about it. Why not test drive both?