You'll want to put about 500 into your sound setup. That's my opinion but I'm sure most would agree that if you want something that looks nice, sounds nice and is going to last then you'll be getting what you pay for. Infiniti speakers are a good way to go to that end and the head unit is up to you. Just make sure you take care of the installation yourself since it's easy as fawk and it'll save you monay. Plenty of DIY's out there, just gotta find em. Hope this helps.