Kmaclac,
I asked a similar question a number of months ago. While my question was about gear, a couple of the responses suggested that I focus on room acoustics/room treatment. It was great advice.
I knew my room had a little too much echo (e.g., could hear some echo when clap hands). After doing some research, I ended up buy some GIK Acoustics 244 broad band absorption panels. These made an incredible difference, not only in the bass, but smoothed out the entire frequency spectrum. I was able to hear notes that I could not hear before, voices were more focused, and little anomolies that I thought were on the recording were in fact due to my room acoustics. I had previously borrowed a $1,500 REL subwoofer (which was great) from a friend, and the approximately $400 I spent on five of the 244s (I have a large room) made a much bigger difference than this very nice subwoofer.
I have no idea what your room is like or how big it is, but based on my research and experience, I think the experts generally agree that any room can benefit from some type of broad band absorption (as long as there is not too much to make the room "dead") and/or bass trapping. You can find more information about room acoustics on websites such as GIK Acoustics, RealTraps, Decware, and many others. Also, a number of discussion boards (e.g., Audioholics, Audio Circle, and Audio Asylum) have boards dedicated to room acoustic info.
I just thought I would pass along some of the best advice that has been given to me on this forum.