Frank, after much deliberation, I went with THIS ONE
and mounted it under the back seat.
I say "deliberation" because in the past, I've not had very good success with Custom Autosound equipment and was highly reluctant to spend almost $400 on a product I couldn't get much in the way of reviews. I posted on several sites asking if anyone had purchased one of these and if so, how was the quality, but I received zero replies. I ended up taking a chance and so far (approx 3 months), it's been a good radio.
My son installed a Pioneer 1000 watt amp in the trunk with 4 three way speakers (and a sub woofer in the trunk), and I have to say it sounds really good. (as long as he keeps that damn base down!!!) It interfaces with his Iphone and my Ipod, so I'm happy so far. Only time will tell though, and I'm hoping prior issues with other Custom Autosound radios I've owned in the past don't repeat! The amp and sub woofer are overkill in my opinion, but what do I know! I'm old and have no idea what a stereo system should sound like. At least that's what my son says!! I on the other hand, have absolutely NO
desire to hear nothing but "boom, boom, boom" as I drive down the street!
The AM/FM mono is still in the dash, and we purchased an antenna "Y" splitter (and a 20' extension for the Custom Autosound under the back seat) so we could run both radios on the same antenna. It works fine, but we rarely listen to the radio. I'm always running my Ipod and my son's always on his Iphone.
The power feed to the AM/FM is also split, but I don't recommend running BOTH
radios at the same time on that one feed or it could possibly pop the fuse. If the AM/FM is "on", the Custom Autosound is "off" and vice versa.
It hasn't been cheap ($400 for the Custom Autosound, $250 list for the amp and $300 list for the speakers), but if it lasts several years, it's been worth it.
(List prices but my son has a friend "in the business" so we got the amp and speakers "at cost", so that saved me a few hundred. It's amazing how much this crap is marked up!)