im new too the mazda world soo cut some slack

i own a 1991 240sx and thinking about getting a 2004 Mazda Rx-8 grand touring for 11,000 $'s

what im here for is is there any known probs of these car's
i know these cars's can be a bitch to work on
....well at least putting a radio ... cuz thats what i do
but i add rep to people who help me!