Hi, I am moving from a 29g to a 55 long. I was recently at the local store and bought a xp4 on sale for about $150. I was just wondering what the general oppinion is on this filter before I set it up. What kind of pads are best? I am not a real big believer in the ceramic-star idea. Also, it looks like it is a real pain to get all the chambers in and out during cleaning. If all 4 locked together it would be a much better design. I am looking for a filter that is going to be silent and easy to maintain. Price is important but not the biggest factor. Should I return it?