Miata reliability meets increased performance, how can you lose? The '04-05 MS Miata was really the last of the Mohicans (RIP NB), since Mazda totally redesigned the MX-5 in 2006 to be more "user friendly" and less pure sports car. Added bonus: it seems as if the Mazda engineers left the door open for several easy speed upgrades for those wanting a little more juice. ;)
Beautiful coke bottle lines on the outside, precise shifting and sublime handling. This car will make you feel like one of the best pro drivers in the world (but be careful because like me, you're probably not;)
Stock wheels are too narrow (and too tall) for a Miata this powerful IMHO. Even if you never roll it, you'll be glad you installed a roll-bar for the added chassis stiffness. There are other upgrades that will make it faster, but I would make it safer first. Bose sound is meh - I replaced it.