Few automakers build affordable roadsters, so the Pontiac Solstice GXP's competitive set is a small one. There's the essentially identical Saturn Sky Red Line, and any list of two-seat droptops under $30,000 needs to include the Mazda MX-5 Miata (even if in this case it's pathetically low on power). The closest thing to the Solstice in terms of power and price is the superior Honda S2000. The least expensive BMW Z4 without a single option runs $6,000 more than our well-equipped test sample, and stretching to the SLK requires significantly more bank; enough that you could consider what you really want, which is a Corvette Convertible.