I have the HK in my 2010 LGT LTD. It's the best stock audio system I've heard, Kicks the crap out of the Bose system in my Vette. However like others are saying for 1500 I'm sure you can get better sound, but I too would be a little concerned with the quality of the "looks" of the install.
I had a Kenwood DVD head unit with bluetooth streaming in my old suby. I miss the BT streaming with the track info, but for now I'm leaving mine stock.