I'm planning to make DIY project for my wife's 2013 Hyundai Accent sedan to improve it's sound quality. For the set-up, my plan is not to put more additional weight like amplifiers, sub woofer etc. Just a simple upgrade to good quality 2 DIN Head Unit and nice sounding separates. It has 4 stock speakers installed on four doors, which I don't know the size, maybe 4 incher only. I want a Sound Quality set up for that car and good sounding bass . I don't want to shell out more than 40K for that, is this possible? Please Help...