I guess you are not the only one looking for the sweet spot for DAP. I dislike DAP which is heavy and big in size. I read some of the recommendation here and i have owned some of them. Recently i got the opportunity to hold kann max from 2nd hand market and saw it in person. I tried it and hold it on my hand. IMO ( i have owned, sp2k, hiby rs6 , hiby r6 pro ii, some other hiby, hiby , all fiio DAP, some other DAP like sony zx707,etc) kann max is one in the sweet spot, such a pity the Kann Ultra was bigger around sp2k size. I really wish companies start making small portable DAP great if possible maybe someday they can make as small as hiby r3 pro 2 but with great sound like the kann max. I am still looking for DAP in Kann Max size but with more refined sound than Kann Max(wider deeper stage etc). For now i brought home the Kann Max and i am enjoying it.