Could you explain your layout and setup? Like is there an entertainment center or is TV on a stand, or is it wall mounted? Pictures of your room would be really helpful or even a drawing.
How wide is your front wall? I'm asking because some ppl like the look of LCR's as you described with 1 horizontally mounted below the display as the center then the L&R vertically very close to the sides of the TV. I'm thinking you should keep your front speakers wider than that if that is what you were thinking. Ideally you want to make an equalatteral triangle from the L&R speakers to the Main Listening Position. So if you sit 10' away your speakers should be 10' apart.