I'd take (and probably am sometime in the future

) the 8 over the Z. Much more practical, better looking, it'll out handle it, the Z sounds choked, feels porky, and higher redlines are more fun.
And i'd take better handling over straightline speed anyday. The RX has enough straightline speed, you can only go so fast (unless its a dedicated track car) but taking a corner requires more skill and feels better IMO.