Recommendations for a integrated amp

I'll pile on here.  I would look for a Hegel.  It has the sound attributes that you want as well as USB in.  Also, you can tailor the sound in the futures with a DAC upgrade.  Good luck and cheers. 

+1 for the Hegel H390!!!  I owned a Hegel H390 for a time, and it was absolutely outstanding, and it can drive just about anything as well.  Once I switched to even larger and more inefficient speakers, I upgraded to the more powerful Hegel H590, which has become my end-game amplification.  I always used a separate outboard DAC with both the H390 and now the H590, and not their internal DACs..  Happy listening.     

Second what kennmacc wrote. I also have H590 and have been very pleased. Bought it used 2 yrs ago for 5k. Also use seperate DAC as there are many reasonable separates that sound better. I hear the H390 is a fine amp too, that used, should be in your budget.

For 1k more, I strongly recommend the McIntosh MA252. A hybrid unit that won’t disappoint.

Hopefully, Hegel has upgraded the DACs in their integrated amps since I bought my H360.

@boxcarman - yes, Hegel significantly upgraded the DAC with the release of the H600, and the latest Hegel release H400 should have the upgrade DAC as well.  

@highend64 - if you decide to purchase Hegel and you want to someday upgrade your speakers, Hegel + Harbeth is a great synergistic match.