What is needed other than the components for an install?

AggieDev

First post to the forums with my new Z! That said, the only negative to the car that I've found is the horrible speakers since I don't have the Bose package (which I'm sure weren't too great in comparison to what else is out there either), but luckily that's a quick fix.

I've done a coaxial install before on my previous car which was a piece of cake, but haven't done a component install so I might pay to have it installed to save the hassle of figuring it out. I think I might get these components. Do those look like they will work? I'm keeping the base HU since I don't care much for HU features, just sound, and am guessing even with the base HU it'll still drastically improve the sound. Do I also need to purchase anything like spacers or wire of any sort?

Thanks!