I have compared two VK-60s running mono with the VT-200. The speakers driven were Dunlavy SC-4a which are large, but 91db and as I recall, my old 801 matrix 11 speakers were in the high 80s. Many of my fellow audio club members also listened and chose. Most, but no all preferred the BAT VK-60s. I can tell you having long experience with both, that the ARC equipment is more reliable and not as much a challenge to manage finding quiet 6SN7 tubes. There is also the option of rolling 6550 power tubes or even KT88s. My opinion is that the ARC sounds more neutral and the BATS have a more classic tube personality. If you chose 801s as your speaker, neither the VK-100 or the VK75SE would provide enough muscle to get all you could from your speakers.
Jeff
Jeff