I started streaming with a Bluesound Vault 2i. That machine literally changed my life... Worth every penny. Buy a Node if you don't need to rip CDs.
I paired it with a DAC and three DACs later I pulled the trigger on an Aurender N200
Again, worth the money as I stream 80% of the time now. I think anyone would be hard pressed to tell where the files are coming from listening to my system.
Rotel just released a streaming integrated amp, it looks pretty nice. I think that is the direction amps and receivers are headed.