Barruch, I don't mean to sound critical here but I believe too many people waste money changing gear when a better system set up might give them what they are looking for. If you were 6' away with speakers spaced 4' apart I'm not surprised if it sounded like mono.
Now no one can tell you exactly how to set up your speakers because there are too many variations with room interaction. But some basic guidelines can help. I agree with Newbee that an equilateral triangle between speakers and listening seat is a good place to start. If your room allows you to be a little more than 6' from the speakers I'd try that. Then, whatever that distance, I'd experiment starting with the same separation between speakers as listening distance, then incrementally reduce the separation between the speakers up to an 80% of the listening distance. Hopefully somewhere within that range will optimize your room.
If you haven't seen a copy, Jim Smith's book "Get Better Sound" will offer far more information on all this.
Now no one can tell you exactly how to set up your speakers because there are too many variations with room interaction. But some basic guidelines can help. I agree with Newbee that an equilateral triangle between speakers and listening seat is a good place to start. If your room allows you to be a little more than 6' from the speakers I'd try that. Then, whatever that distance, I'd experiment starting with the same separation between speakers as listening distance, then incrementally reduce the separation between the speakers up to an 80% of the listening distance. Hopefully somewhere within that range will optimize your room.
If you haven't seen a copy, Jim Smith's book "Get Better Sound" will offer far more information on all this.