So, I've had my smart a bit over a month now, and am loving it. However, I've not been satisfied with the audio. I have the radio 9 package. First thing I did after getting it home was start looking at speaker upgrades, and ended up picking up a set of the popular Polks from NCC1701. Those made a BIG difference. The mids sound great now.
I am *not* an audio snob. I dont need much. However, I would like a more full range of sound. I expect that means that at some point, I may want to look into a sub (likely under the dash), and a new head unit for a few other features I would like.
Beleive it or not, the Smart is my first car of my own. Prior to this it's been my motorcycles and Zipcar/rentals/borrowed. So, now I'm digging into the absurdly large world of car stereo for the first time, and lots of information I'm still absorbing.
As such, I'm looking for reccomendations!

One thing I've learned that I can always count on the world at large for, is opinions. Everyone has one!
So here's what I'd really like, and then if I can pick what I need and swing the cost, maybe I'll even be able to make it happen in the next couple months.
As I said, I'm not an audio snob. I mostly listen to FM radio and my ipod (iphone).
I wouldnt mind if the head unit's internal amp is good enough that I could avoid screwing with trying to figure out where to stash an amp and running wires all over the place.
An in dash Nav would be cool. I've currently got a little Garmin Nuvi, but wouldnt mind something with a bigger screen, and being able to hear the little voice announce turns wouldnt hurt either. Something with a reliable way to update the map data would be good.
I may be interested in satellite radio in the future, but am somewhat neutral about it for now.
I dont really care about DVD, but suppose it could be cool. I dont really see any need for a backup camera, seeing as the rear window pretty much IS the rear of the car. I doubt I'll ever end up adding a trailer hitch.
I would like it to interface WELL with my iphone. I know some head units cant even operate a playlist, which is not ideal. Some use playlists, voice control, and even show album artwork. That would be sweet. Hands free calling would be good, but doesnt need to be bluetooth, since I'm hoping to have a cable plugged in for control and charging.
I might be fine with my polks, given a little more bass cabailities of a small added sub. I may even want to upgrade them later, I'm not sure yet. But this is how far I've figured this out so far. Did any of you have about the same list of desires and find something that was just perfect for you (and didnt break the bank)? If so, I'd love to hear about it.
dovienya