THese are companies owned by GM:

Buik
Cadallac
Chevrolet
Satern
Saab
Pontiac
Oldmobile
Suberu (I think) yes I want the WRX!!
Hummer (out of the question)

Companies Owned by Ford:

Volvo
Mazda
Lincoln
Ford
Jaquar
ASton Martin
Land Rover
Mercury

Companies owned by Nissian

I think its just Nissian and Infinity

Companies owned by Chrysler:

Chrysler
Dodge
Jeep

Now those are my options keep in mind I only have about 18000 to spend so any info or idea would be great! Like I said I have my I on the Mazda MP3 or the Protege5

Sorry so long
Dave