depends what kind of sound and how much money you are willing to spend. I have disconnected my rear speakers and i have gone for mb quartz components in the front, run by a jl audio 300/1 amp. Then for the back i have a jl audio w7 sub (mother of all subs) and that is run by jl audio 1000/1 mono amp. kenwood dvd player set up cost £2600 but sounds wicked. Just depends what you are after