I listen to pretty much everything but cRap but mostly country, 70's and new stuff with my 10yr old.
I got a couple of quotes this past week. One was an all alpine set up for around $800 and the other one was JL but it was laughable as the sales guy just threw something out. I'm not going to be installing it myself as I have never messed with an amp in a car. Right now I'm just trying to see what other's are using in their Jeep's.
If he "just threw it out", did you ask him why he recommended these models? A head unit needs to do only a few things- send signal to an amp but if you want iPod input and control, that would rule out most models. If the sales guy didn't ask any/many questions, go somewhere else and if they don't ask questions, keep looking.
For us to make recommendations, you'll need to list your requirements. If you want iPod support by the head unit, mention that. You wrote that you have speakers in a sound bar- what size? Looks like 6-1/2" but the depth will rule out a lot of models. If you're able to remove one or have information on their size, let us know. If you remove one, you'll be able to see how much space is available for the tweeter and crossover. Since the speakers are right behind your head, I wouldn't bother with active crossover and the installation will be more simple because no additional speaker wires will be needed, other than to connect behind the existing radio. The amp can go under one of the seats- I would look at a 4 channel- two for the front speakers and the other two can be used for the sub (bridged). The soundbar speakers won't need more than you already have because they're so close to you. If you remove the top often, I would try it without adding more power and if needed, add an amp. A 6 channel amp will be a lot more expensive and probably won't fit in an inconspicuous place. A smaller second amp can go under the other seat.
The one thing that will make or break the installation is how the power and ground for the amp are handled. If the cable size is too small, the amp can fail because of the extra heat caused by voltage drop (the gauge needed is based on current draw from the amp/output power). The amp needs to be grounded correctly because you'll hear alternator whine if they do it wrong. Also, a bad ground will cause teh same problems as small power cable. Worst case, if the amp's ground lifts from the body, it could take out the head unit or other electronics.
You'll need to listen to some speakers-you may get a lot of recommendations but you have to like the way they sound. The amp should be able to supply more power than you need, but if the input levels are set properly, you'll never have distortion coming from the amp- only the head unit because it was turned up too high.
As far as the subwoofer, assuming that you don't want it to sound like a rap system, a 10" should be fine, as long as the box is correct. Many woofers that in order to work in a small box are available- I would recommend one that works in a sealed box- if the box is small and ported, the port can require far more volume than the woofer to hit the low notes and if the port is wrong, the woofer's power handling can suffer.
