subwoofer crossover- lowest is best almost always?

My crossover is set at 25 hz.  My speaker crossover is 55.  It does not sound like their is hole in the music.  In fact, the opposite.  Piano sounds full and real.  Voices are more intimate sounding.  I know that everyone room is different but I truly believe in almost any circumstance that I have had with sub's is less is more .  I can see why someone would not want one at all. I use a rel strata 3 currently.

That sounds like an interesting component.  

Actually, I forgot about room acoustics, that is probably the most important part of good sound

Actually, I do know how to set up a system and from my experiences, anything above 30 hz and systems start to sound more like a pa system.  The most important part for me in setting up a system is main speaker placement.  Then, where do I have my components.  Sticking a huge subwoofer in an area close to my other components causes problems.  Ideally, they would be on a side wall but that is a luxury in my view.  Subwoofers are made to reproduce low frequencies, not be a midrange.  If my speakers only go down to 50 hz, I cannot expect miracles.  I will never get the soundof a true full range speaker, but their are compromises there two. Most full range speakers are rather large objects so they need a larger room.  Speakers that go down to only 50 hertz are not made for a large room.  So a sub crossover set at under 30 hertz should give you more than enough low end and integrate fairly well with main speakers down to 50 or 55 hz.