I used to be, but I'm about 9 years removed. I'm looking for advice on a head unit. I've been an Alpine elitist for years, but I can't justify what they want for their double din head units (they only sell units with built in nav, which I don't care for). I'm looking for a touch screen unit that will work with my iphone (audio/video), backup camera, preouts for a couple amps, bluetooth. Pretty standard stuff. I'm leaning towards a Sony XAV72-BT, but I remember being underwhelmed with Sony products when I used to do installs professionally. The JVC KW-AVX840 also has my attention. What would you buy for around $600?