Hi there was a third email i can't seem to find but ill go in to my account tomorrow and get it as ive obviously deleted it from mail but heres the other two hope this helps.
Are your GS20's part of a stereo pair or an AV system?
If a stereo pair (which I think they are, correct me if I am wrong), start with them approx 6 - 8 ft apart, toed in slightly and about 8 inches from the wall. If it is too bassy, move them away from the wall, if not bassy enough, move them closer. Same for imaging. If you are not getting much stereo imaging (like there is a gap in the middle), either toe them out a wee bit or move them further apart. Another general rule of thumb is you place the speakers the same distance apart as you sit from them. The sound should be as if it is coming from the mid point between the two speakers.
In an AV system, they might need to be closer to the 8 feet apart so there is a transition between centre and left/ right. Toeing them in should negate this when listening to them as a stereo pair.
You should notice an improvement from around the 50 hour mark. If you want to speed up the running in process, you can place them face to face (almost touching) and wire one out of phase. Then you can play them at an average listening level and the will not be that much sound radiating from them. The method of connection doesn't speed up the running in itself, but means you can leave them running with a CD on repeat, when not actually listening to them.