Right first hello im new and this is an awesom forum

spent many an hour on here lurking.
now im thinking of installing a carpc using the double din subaru adapter with a liliput in the front and have it all planned but the problem i have is the amp.
obviously i cant wire the car speakers upto the pc mainboard so any ideas on whats best to do. Ive seem some amp kits around from places like 41khz.com like the amp9 which is a 4 channel amp but would that do the job? is there a better option?
you get the idea just want some opinions really from the crowd who have done this kinda thing before.