I am about 6' and similar weight to yourself.

It's a bit tight getting in but that's it. Once in everything is OK. Getting out is no problem as long as you don't park so you can't open the door.

I preferred the Crossfire over the 350Z or RX8. Personal choice I guess.

Can't help with insurance. Different country, different requirements. Over here, under 25 means big insurance premiums on anything but mainstream sedans.

Good Luck,
Regards
Ausfire.