Today im using Audio 2 DJ (native instruments) from my computer to my mixer and monitors , i want to replace the audio 2 dj with new DAC with medium budget like 150$
any suggestions ?
Why? We need to know what you don't like about the Audio 2 and/or what extra facilities you need.
Also since the Audio 2 is a new product (iOS compatible) and a famous good value @ ~ $100 what you expect from an extra $50 isn't mid range at all. Mid range interfaces start at about $250 minimum. Pro gear starts at $600 and 'boutique' products can cost thousands.
Have you ever tested yourself to determine the limits of your hearing? e.g with Foobar A/B/X component or having a mates plug different gear in without you being able to see which is which?
If you do have 'magic ears' then just spend as much money as you can afford and you will 'hear' an improvement more or less directly related to how much you spent.
Otherwise pretty much all DACs from reputable manufacturers now sound identical to the human auditory system. Or they ought too unless something has gone wrong somewhere.