Hi First I want to say Hi And Thank you to everyone for any advice, I have been reading a bunch of the other postings and enjoy reading about everyone's advice. Now on to it. I have a JK Wrangler 2 door with a RHR MyGig head unit going to a Alpine PXA-H660 to a Alping PDX F4 and a MRP M500 for mono. the speakers are JL C5 components in front JL C2 coax in Sound bar and A 8W3V3-4 in the Stock enclosure in the rear. I am thinking about upgrading the mono amp and then started looking at the 5 channels as an alternative, My question is first am I loosing anything by going with 1 amp or is it better to stay with seperate ones? which would offer the best sound Quality? I will find a place to mount something a bit bigger but if I can stay with a small form factor great as space is a premium hence the stock sub enclosure. Also I do not know if it is the definitely the amps fault but the Sub Pops when I turn it on, and I do have a small amount of noise coming from the speakers between songs. If I can get rid of those things that would be great. I am not looking to enter any SPL Contests but I do want very crisp clean and full sound at low and High volumes. (I know that is what most want) and I don't want to take out a mortgage to get it. Any help opinions and suggestions appreciated Thanks sorry for the long post.