You are really asking in the wrong place. The guys here will talk you up to a $3,000 DAP
I have an M3 Ultra along with some higher spec gear and the little M3 Ultra does a good job with any IEM in my opinion.
In terms of power it has plenty for IEM, in terms of sound it is really no different to other modern gear. Many will talk of significant sound differences between gear but I think that is exaggerated at best. I don’t want to get into that conversation here because this thread is frequented by users of often the highest end gear who more often than not have a rather different opinion to mine on that subject.
If you are somewhat new to this I offer that the M3 Ultra will do a fine job, will give you a lot of enjoyment and you can try different equipment in time and decide for yourself what you hear and what you don’t.
The best IEM....or my favourite form what I have now is Monarc MK III.
In terms of operation, M3/M6 Ultra should be very similar, if not identical, given they have the same 665 SD , right? Also from specs...even if the M6 battery has higher capacity....the M3 seems to last longer, I guess this is lass power hungry. Do you think this is true?
One last thing: build quality and design are almost identical as they seem in the pictures ?
Thank a lot!!!