They sure look really great when they match. All McIntosh, all ARC, all BAT, all Schiit... looks great, and almost certainly compatible. And if that relieves the stress of wondering what if? then it’s a good choice.
I was using an SP8 with a VT100 and found it was not a good match! The SP8 has way too much gain. (I know, it can be changed, but I’m making a point here.)
Buy what suits your purpose and if matching components please you, that’s a good enough reason to buy them.
Have fun!