im totally new at the whole car scene.. learning more about it... but i ahve a 04 rx8 with stock 18'' wheels and i need to get new ones.. i was thinking about getting 19'' with smaller tires... what are the sizes i should be looking at for my car?

depends on how wide your wheels are and how wide tires you want to go.

Read the stickies in this forum.

what do you mean by smaller tires?
you mean thinner?

take a look in the wheels section eddie. if you can't find your answer there, post again with a little more information on what exactly you want. your question is just way too general