I just got my first Q45 and i want to put an alpine double din into the car in place of the bose stereo it has now. ive been reading a few posts saying i need a special harness and other posts saying it works without the harness so im wondering what exactly do i need to do ? i would like to keep the stock speakers for now since im on a budget. I know a couple of you have switched out the stereos so if anyone can maybe link a previous post explaining this or maybe you have personal experience you can share. Any positive input is appreciated.