I didn't want two DAPs. I had the Fiio X5iii but it did not have optical out (only had coaxial output). I bought the Ibasso DX 150 because it has optical output. Both have a similar sound signature but the Fiio has better UI for driving. I thought the optical ouput would cut down on conversions since most DSP's have optical input. Nick knew better, and again he was right. I can not and will not ever hear that extra conversion. Now I can use whatever DAP I want.