Hi everyone I'm new here and I'll be getting my HCH-II in July. I'm getting one without the navi and I wanna add an amp and a sub to the stock unit. I'm not looking for loads of bass but just some additional boom so I'm looking at the Bazooka Bass Tube with a built in 50watt amp. I've experienced it in my friends car and its a pretty neat unit gives out clean bass and I've read lots of review and 99% of the people like it. I think it should make a good addition to my HCH-II. But will I see a significant loss of MPG? Anyone has the Bazooka too? Share your thought. Thanks.