I like your picture. It looks like you bought a stand for the bookshelf speaker and put a board or something on top to put the center channel on top? How did you do that? It looks very professional.
I recently bought the 1723 2V. I prefer the sealed subwoofer sound with music, but like the extra extension of the vented during movies. I like Arendal includes the foam to plug the vent to convert it to a sealed subwoofer. I look forward to hearing and testing the subwoofer in both scenarios.
I am sure you will love the 1723 2S