All else being equal.............................

I would definitely pick the Ayre.

I would choose the darTZeel LHC-208 'danalog' Streaming dac with integrated amplifier

you eliminate a separate dac and the cost, space, and cables, the amp and preamp are world class. amazing performance. not cheap, but considering what it replaces in a system it's actually quite modestly priced.

just add a server and speakers and you are good to go.

Since i'm not a fan of Krell's latest offerings, I would lean toward the Hegel. Bare in mind that i've read commentary on here & on other sites reporting there is a difference in sound between the H200 & H300, and some owners on here prefer the sound of the H200. Unless you need the H300's included dac or digital inputs, I would suggest reading up on threads here discussing the two amps. Here is one example.

With the above said, if you're open minded about other potential options it would be helpful to know you budget, accompanying equipment (amps, speakers & cables) and approximate room dimensions so members can offer more appropriate advice.

Since you're the TUBEmeister, contemplating SS, check out the tube/SS hybrid Ypsilon Phaethon