New System. Head Unit Important?

[MT523]

* NEW * CAB-1600.1 Amplifier - Car Audio Bargain
but keep the gain down until you possibly upgrade later

it'll be an easy resell a few years down the road if you go bigger

Wow that's a ton of good reviews. More $ than another one I was looking at, but based off quick glance I feel like I'd regret not going with the CAB.