I am happy with the quality of the JL in a sealed box of 1.4 cu ft, but I would like more volume. I (and more importantly my wife) are unwilling to replace the factory HU, so I just bought an audio control LC2I and hope to get better results than I currently get. I love the sound, but I just don't get the volume. The most I would spend would be $500 to 600, but lower is always better, I am a teacher who hasn't gotten a raise in 4 years. Ported boxes used to produce boomy or sloppy bass, but I know todays subs are much better than yesteryear. I do love the crisp, tight bass from a sealed enclosure and would lean in that direction.