In that price range I would probably be looking at the Schiit Audio products. For the DT-1350 I would be looking specifically at the Vali 2, which is priced at $149. I used to have a DT-1350, nice headphone. One question I would ask, is this your only headphone? If so, you can easily get by with something like a Vali 2, or something similar, wouldn't spend more than $200. If you have others and can spend more, look for something used. $300 in the used market will get you enough amp to power 80% of what's out there, though takes some time to do research and patience to wait for something good to come along.