Erko

Hey everyone, I'm stationed in the army here in hawaii. I just bought my first rx8 and did a lot of research before buying, I just cleaned the maf, did oil, tranny, and diff change. Also got plugs wires and coils. Car has 70,000 miles just wondering what else might be good for maintence. I want to keep the vehicle stock, but I would like an aux port, what seems to be the best say to get one as well? I've read a lot but haven't read enough reviews people say get this or that, but never why.