I am new to car audio and I dont really know much about it. I was looking to spend around $300 on a head unit. I'm pretty sure I've narrowed it down to the alpine 9887 and the alpine x305s. I'm mainly going to connect my iPod to the head unit. Also, my car is a '99 Infiniti G20. The factory stereo is double din. How can I mount a single din into the double din slot. I've seen people who have a little space underneath the head unit. Help me out guys.. I'm a noob.