Help me choose an integrated amp to pair with Anthem MRX 520 receiver

Looking to add an integrated amp to take my system to the next level for 2.1 or 2.0 music.  After investing in a network streamer, I find myself listening to music a lot more than I anticipated when I bought my receiver.  My gear:

• Anthem MRX 520 receiver
• KEF R300 bookshelf speakers
• LUMIN D2 network streamer

I'm pretty sure I want an integrated amp with bass management unless someone can talk me out of its importance.  I'm considering the new Anthem STR, but that's at the very top of my budget.  I've also researched the Parsound Hint 6, although I like the idea of having my receiver and integrated amp from the same manufacturer.