A couple thoughts on getting the most out of your system.
1) The LFE setting is irrelevant to music unless you are referring to multichannel audio with specifically encoded material for the LFE channel. Leave the LFE setting at 120 Hz as it is the low pass filter for the LFE channel for movies and is spec'd to 120 Hz but many AVR manufacturers incorrectly auto-set it to 80 Hz (and many people mistakenly think it is a crossover when it is not).
2) Keep your speaker settings at small, most likely an 80 Hz crossover or so (60Hz may sound better but 80 Hz is an easy place to start).
3) Verify the phase settings on your sub are correct (incorrect phase can have the sub fighting the mains as opposed to working in conjunction with them)
4) Move the sub out of the corner as it may be making the bass sound bloated/boomy, try placing it at 1/3, 1/5 or 1/7 intervals across the wall.
5) Set your bass setting to LFE only, not LFE+Mains.
6) Experiment with moving your mains off the wall, the .5 meter to 1.0 meter recommendation is not a bad rule of thumb to ball park where to start. Placing your speakers too close to a wall bloats the midbass and bass from the speakers.
7) Experiment with your seating locations as well,
one recommendation is to try to keep your listening position 38% into the room from either the front or rear walls. While that is not practical for all rooms, keeping the seating position away from the walls will help with all aspects of your systems imaging, especially bass performance as bass tends to become exaggerated/boomy/bloated near boundaries.
8) Read the
Audyssey set up thread for specific recommendations on how to optimally run Audyessey.
These are all free and can be useful to get the best performance out of your system, they also translate pretty well for most rooms. After proper placement of your system/yourself and Audyssey set up (which is more of a process than many manufacturers try to make it out to be) then you can start looking at other options such as bass traps (which are almost always beneficial but not a panacea) and sub EQ.