Looking for headphone amp/DAC

I am using Sony MDR-7506 headphones with my Apple iMac. I don't want to spend more than $150. I spend a lot of hours at my computer listening to music. I mostly listen to Hi Rez Qobuz. I am thinking of the the Zen Dac. Any thoughts about this
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

Between the Dragonfly Cobalt and the Dragonfly Red, I thought the two definitely had a family resemblance in their sound. The Cobalt MIGHT have been a litter clearer, but not too different from the Red especially after adding a Jitterbug. I actually decided to get a Red over a Cobalt as it sounds more punchy which I think works well as I'm often listening on the go in different locations.

The real step up from a Dragonfly that I've heard is a Chord Mojo that provides greater 3 dimensionality and presence. You can get a used Dragonfly Red on eBay for about $140 to $150 shipped.