as far as price/investment rationalization, it can only reasonably be done if you are considering the other top level 'uber' digital choices. I'm not going to mention any, as I don't want to go down that road. but if one is wanting top level, and I mean top level, digital, that can play in the league of analog performance, then it's easy to make the MSB Select case.....particularly over time.
if 'uber' digital is not a choice then no worries.....but forget trying to make the rational case.....you cannot.
and that is how I looked at it. laws of diminishing returns certainly apply......and everyone has to decide how much additional performance they want to invest in for multiples more dollars.
we are now immune to 6 figure vinyl playback systems when you add tt's, arms, cartridges, RCM's, phono stages, etc. etc. lot's of those here on WBF. that level of investment seems reasonable. so a digital system in that price range is no less reasonable (I'm not suggesting that either really makes sense).
or a second Ferrari, or a room full of wine.
this is all just a perspective kind of thing.
and my system is particularly sensitive to anything that brings a sameness, artifact or coloration, and so the MSB Select II is a very good fit. it's a clear window. the system is in a fine balance already, I don't need any ying or yang.