I am currently at the same place as you do, 300$ budget for DAC, the bifrost is what I wish for but with all its upgrades it reaches 520$ its way over 300$, someone recommended me Musical Fidelity v90 dac but i can't seem to find much reviews on it and I heard musical fidelity is not what it used to be since they moved they production to Vietnam.
Anyway I am starting to play with the idea of buying a portable dac/amp with an emphasize on the dac this way I can get a portable combo for my IEM or any other low impedance HP and a dac for home, it might be a good idea to save some money..
There are quite a few options , audio quest ff, meridian explorer, but I think HRT mircostreamer is the best considering connectivity to mobile devices and sound wise up to 300$
About the ODAC, I heard a lot of recommendations though its sound to some as flat and very analytically, this is why I am afraid of it, I don't want something to flaten my bass but actually emphasize it ...