The rx-8 is technically not a sportscar according to our insurance company. :) So you are good to go.
But personally I'd sell one of them. Put that into revenue generating income. If the 8 works for you sell the Z. Else keep the Z and get a mazda3. Saving money FTW.

RX8 and Skyline

It would have to be a pretty good offer. I presume I could get more by selling my summer wheels (6.5-lb CE28Ns) and hardtop separately. Has a newly re-upholstered leather interior ... oh you can get most of the details here:

http://www.cardomain.com/ride/460939

only the 8 for now haha....in the search for something turbo charged for the weekend rides haha.....supra anyone?

we have 2 in our household. the 8 is my girlfriends and i drive an srt-4. the mazda is bone stock as of right now. warranty just ran out, so we're gonna start modding it soon. have a few more things to buy for the neon, after that, think we will start with a nice set of coilovers for the 8.