Why change out the HK unit?
For me, I mostly wanted the ability to control the ipod / usb device.
I didnt dislike the HK, but figured if I was going to spend the extra coin on the ipod controls I might as well sell the stocker and buy the sony with the device storage built in. Other feathers like XM & BT will be in my next one.
This is the exact reason I switched. I also went with the Sony with storage tray.
2012 FLTRX, 26" AS Bolt on kit, 26" Mad Wheel, Dirty Bird Top Shelf Rear, Yaffe Tank, B'Cool Front Fender, Fueling 574 Cams, Sikpies Exhaust, 12" Yaffe Bars, Alpine Head Unit, Hertz hpd4 amp, 4 Hertz Spl 6.5s, 2 Hertz st35s, 2 JL 8.8s, Voodoo Speaker Lids, Rear Air Ride