Which car stereo/deck/in-dash dvd 5.3" should i get?

I've been looking at getting a new car stereo for hopefully under $300 but can go up to around $325. I can't decide on what to get. I've seen a few but i have no idea if companys like TKO or Lanzar have a bad or good rep. I dont really like the idea of having a 7" so please let me know any information you have on this subject.
I would also like to have an aux input and ipod cable in it.