Parasound Halo Integrated vs Yamaha AS2100

It doesn't have digital inputs for streaming devices etc for when not using vinyl. 

the Yamaha does not have a DAC but is an amp and preamp, the Parasound also includes a DAC

no right answer whether to have 1 or 2 or 3 boxes...

I have a Parasound Halo Integrated in my second system.  It replaced a Rogue Cronus Magnum tube integrated and I couldn't be happier.  I am driving Golden Ear Triton 2 speakers with it.  I listen to this setup at least 6 hours a day, every day and I never, ever get listener fatigue.  The built in dac is an excellent ESS dac and the amp is dead quiet.  It also has tone controls which I feel is a great feature.  I am a very happy camper.  I never liked the sound of Yamaha which I had back in the 90's although I have not heard the newer ones.

I own the Halo Integrated driving a pair of Kef LS50s. Powerwise, the Halo is a beast. It will drive pretty much any speaker with plenty of authority. I cannot go past quarter volume without getting a dirty look from the wife. The DAC is second to none in my opinion. I have my TV connected to its optical input and the Auralic Aries Mini connected to its USB input.

One minor complaint I have is about the headphone output. When I plug my Beyerdynamic DT-1350s I can hear a very present constant buzz during low volume and quiet song passages. I isolated any type of ground loop and DC offset. My local technician told me that the integrated headphone amp was simply a "courtesy" and not to be taken seriously especially as the signal was delivered by a mini jack. On the other hand he was truly impressed with the internal components and thought that the Halo cost double of what the retail price actually was. To Parasound's defense, the DT-1350s are the most revealing headphones I've ever heard.

I still wouldn't hesitate to buy the Halo Integrated again. It just takes the guesswork of trying to match DAC/amp/preamp. As my main system, it left me left me looking nowhere else.