I own a pair of Quatro Ct's myself. Very enjoyable speakers!
Will your dealer be doing the setup? If so they should have the tools necessary to dial in the speaker. I think the sweet spot of the Quatro is less sensitive to lateral positioning than it is to vertical. Also, don't be too prescriptive in the placement of the speakers and/or listening chairs. The optimal listening position (sweetspot) is usually a function of all of the conditions that you seem to have pre-determined. Be flexible...
Will your dealer be doing the setup? If so they should have the tools necessary to dial in the speaker. I think the sweet spot of the Quatro is less sensitive to lateral positioning than it is to vertical. Also, don't be too prescriptive in the placement of the speakers and/or listening chairs. The optimal listening position (sweetspot) is usually a function of all of the conditions that you seem to have pre-determined. Be flexible...