I love Rockford Fosgate. Great stuff, there products last a long time (with proper use). You say deep bass, well that all depends on size of sub. Go with 12" or better yet 15" to get your deep bass. Sound Quality is nice. It is very crisp. I have been happy with it.
sound quality is real important to having a great system, i'd rank it pretty high. overall deep bass would also be pretty high ranking on my list but not as high as S.Q.