Bought my 2015 Si the other day. Like the radio but disappointed there wasn't any Nav/Sat and the bluetooth sucks pretty bad so I'm looking to replace the HU. I was wondering what you guys are using or would recommend? I really want Navigation/Satellite + good blue-tooth functionality. Planning to install myself to keep cost down. I don't want to spend more than $500 if I can since I'm on a bit of a budget. Was planning to use Crutchfield as well to order my stuff.