Speaker placement - need some help

Need some expertise and comment. My listening room is 22 feet long and 15 feet wide. Ceiling height 9 feet. I have my speakers along the long side approximately 6 feet apart, each speaker being approx 8 feet from each side wall. Each speaker is 3 feet from the rear wall and the listening position is 2 feet in front of the wall across from the speakers. How does this seem in proportions? I played a bit with CARA the computer program, but my speakers are not in their library. Looking for suggestions, such as move speakers further apart or move them closer or away from the wall. You guys are always great help. By the way my speakers are a 4 way base-reflex design 15 inches wide, 15 inches deep and 40 inches tall and weight 60 lb each.
Thanks in advance.