Looking for headphone amp/DAC

I’ve got those Sony MDR 7506, I think they might be the brightest sounding headphones that ever were.   Brighter than my Grados even.  You are going to need to carefully select the amp for those phones. I’d suggest something that has a warm sound signature.  
 And just so you can get a different flavor, I suggest getting a pair of Koss Porta Pro headphones.  A warm sound but still good detail.  Don’t be thrown by the looks, they’ve been in production since 1984 for a reason.  At 30 bucks or so, you’ll thank me.

Thanks for all the responses. I am trying to decide between the Ifi ZenDac and Audioquest Cobalt. The Cobalts are a lot more money so I am reading the reviews

I’d add the Topping DX3 Pro v2 to your list that can be had at Drop for $209.  Best of luck. 

That Topping DX3 looks like it checks a lot of boxes.  Do you have any idea how it compares for sound quality to the higher priced Topping DX7 Pro?

The Topping D90 looks like it would be amazing but it isn't a headphone amplifier.

I am really enjoying the sound from the FiiO BTR5 which is starting to seem like the best $100 I've spent.  I would love to find something with even better sound that is also a bluetooth/DAC/Amplifier that I can use for headphones and as an input to my integrated amplifier.  Ideal budget would be $200-500.

thanks for the posts. I will be looking into all the suggestions that were posted