My RX had its aftermarket system removed when i bought it originally. I figured since it had already been wired up for a system that wasnt stock i could just plug my deck from my honda and it would work. Found otu today that wasnt the case and the plug thingies were completely different. Is wiring up a stereo something that i could do myself? Or is it something that would be better left to the pros to do?

Yeah.. Unless you are stupid.. wiring the radio is easy to do.. but it is hard to install it and make it look nice on some cars.. but most 80's and 90's cars were fairly flat in that area .. so you should not have a problem..