I would try to find find a reputable audio place near your house. Best buy can do the work but they normally sell not as good equipment and their work can be shoddy. Find a reputable store even ask the dealer where you bought your vehicle where they get their audio work done and see if they can maybe get a discount for you. I used to work for a dealer and we had a place that did our audio. Be clear on what you want and don't let them up sell you. Pick a price and stick to it otherwise you'll end up spending way more than you need to.
But overall; find a shop and talk to them. Veeky Forums won't give you any advice cause most here have never done more than an oil change and those who have done work on their vehicles especially in the audio department probably won't be much help as you've seen in your thread
