The W505 is a great unit. You can always add nav with the Blackbird, which docks inside the head unit. If you do that, you'll get Bluetooth at the same time, including the ability to dial, answer, hang up, see your call lists, phone book, etc all from the touch screen on the head unit. Pretty sweet, and it actually works really well. As EW mentioned, you'd have to add everything else separately, like HD radio, Sirius, Imprint, or the H701 processor (awesome piece), but I really believe going that route leads to superior results over anything else out there.
I also use the HD amps and JL components, and I'm probably biased, but I think they sound incredible.