Welcome aboard the good ship saab scene . As MRF says year model and such like , also what sort of budget you got ? . Would you be fitting it yourself as you say you are ignorant , but not deliberate about cars , cis there woukd be certain amount of plugging in wires and such like with replacing . Also you could always try ebay or Google and look for upgrades , then you can fix your price range and what sort of features you want , and also what wiring loom(s) you need to fit it in your car . Happy searching .