List of best Headphone Amp/DAC combos under $3,000

Hello.  I am looking to streamline/integrate my main system and headphone system.  I plan on replacing my current CDP/DAC in my main two-channel setup with a DAC/headphone amp combo to have between my amp and laptop.  It must have unbalanced RCA inputs as my integrated amp doesn't have an option for XLR's.  With the help of you, I plan on putting together a list of products and going from there.  Looking forward to your input.