Well, I don't see many makes investing in a RWD platform for the <$25K market. BUT, the Mazda3 platform might be able to have AWD, which is better than FWD.
Maybe a Mazda3 with AWD for under $25K?
Mazda does have the Miata chassis, I wonder if they could adapt it to other forms?
Heck the Matrix has driveshafts in the back. What about dropping the front shafts, adding some real power that has some torque? I know it's not three boxes, but it would be fun and practical.
Of course, the 1999-2000 C230 Kompressor makes 190hp, is RWD, has four doors, a real trunk and sells used for under $20K. You get four airbags, ESP, ABS, four wheel discs, and tons of other stuff.