Two seater street/stock class car

[Patrick Jones <pcjones33@yahoo.com>]

Hi - My wife is looking at a two-seater sports car for
street and a stcok class autox car.  She really likes
the Honda S2000, but is interested in the Miata too. 
The Boxster is a possibility, but may be too
expensive.

What would you recommend, new or used, for a fun,
reliable car that would be comptetitive in it's
respective stock class?

TIA

patrick