The Pioneer AVIC-Z2 and Z3 models are top of the line and demand a pretty hefty price tag. They offer all the bells and whistles, including Voice Recognition, rear-cam, Bluetooth, both Sirius and XM ready, a 30gig HD (20 for nav and 10 for music, pics, etc) and the installs have been pretty sweet looking. No knobs, all touch screen. The only drawback other than the initial high pricetag ($1200 - $1800) is that some of the options will require you buy extra add-on stuff (i.e. Bluetooth adapter, SatRadio adapter, rear camera, etc). Yep...more $$$.
The D3 is also a very popular model and not near as expensive (less than $600 if you search the internet), but you will also have to buy add-on stuff to take full advantage of it's features. Pioneer has just come out with the F-series line-up and it seems to be more end-user friendly. Bluetooth is built in, as well as some other features. There are 3 different F models, with the basic starting at about $600. I haven't heard or seen one in person, nor do I know anyone who has gotten one yet. Still, the price range does seem a bit more practical unless you have an unlimited supply of funds.
exwrx has pointed out other brands as well, which seems to be a pretty good list. Since I've recently become a Pioneer fan for H/U's, I have done a little more research on their models than I have on other brands.
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CGM/Black/M6/17", Volant CAI, Flowmaster Super 44's, StolenFox H-pipe, 20% Diamond Tint, Kicker 08CVT654's, JBL GTO607C, JBL GTO637, Audiobahn A8002T, Audiobahn A4004T, Audio Control LC6i, Sirius Stratus, DEI FM Relay, Aux-In Mod.
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