advice

ok i have a few questions here. Its for a 96 civic coupe.

1. How is this head unit. Kenwood KDC-MP919 . Im just wanting some imput about it. If anyone has had it or does have it what do u think.

2. Along with the head unit im upgrading speakers maybe subs and everything that is involved with the process. I want some nice clean sound. What does everyone recomend.
I dont want to spend a mass amount of money but you get waht u pay for but give me some options if u could. Actally waht all do i need honestly i know nothing about speakers and sound systems and iv been reading some posts and im confused with just about everything. So i need alot of help.

Thanks everyone