new to 370z systems

Nillaz

I currently own the 9990 and will be switching out my amp for the V9 in the spring. I don't own Hertz currently but I've been impressed with them in the past. Personally I think a 12" sub is a little overkill for a car as small as the Z but it really boils down to personal preference.

Bottom line is that these are all well regarded components that are commonly installed by members of the forum. Should sound great.

I can't help you with installers in Texas but installation in the Z isn't too difficult if you've ever installed car audio before (assuming that you don't have the Bose package. That's still doable but a different animal entirely). Dismantling of the center console is fairly straightforward, you've got a bit of room in the center console to work with as far as harnesses and whatnot are concerned, and there are relatively easy to use pathways to run wires to the hatch for your sub. Getting new wires ran for your door speakers can be kind of a pain in the *** but is really more tedious than difficult. You should take a look at SlikNik's Install Videos before making a final decision on professional vs. DIY install. They're stickied here in the audio forum and will literally walk you through the complete install step by step.

Best of luck!