i tink the room is the most important component. unless someting is physically wrong w/yer system/set-up, the fact that yuve changed this component recently, w/yer consequent results, encourages me in my belief. the *next* most important component is the speaker, imo... while ewe may have tweeked speaker placement, i hope, for yer sake, it's *not* yet optimized. ;~) time to tink outside the box - nearfield listening? more room treatment to cancel 1st-reflection points at sidewalls/floor/ceiling? move speakers further from the wall behind them? move listening spot away from wall behind it?
not knowing more specifics about yer exact room set-up, & speaker brand, it's hard to make specific recommendations, but someting doesn't seem rite - *generally*, best sound will be w/speakers facing straight-ahead, or towed-in only a little. this assumes adequate elimination of 1st-reflections, speakers away from wall behind them, listener away from wall behind him/her... of course, there are always certain speakers that don't conform to this general model.
keep experimenting w/speaker placement in yer gnu room!
good luck, doug s.