This seems like the right question for manufacturers like yourself to be asking.I'd like to take the opportunity to ask you folks here: If I was able to make a headphone amp available in a prettier case, with a volume knob that felt right, and that would provide the same performance (except likely lower output power) for around $500-600, would you be interested?
Or let's say I went the other way and wanted to make an amp for the $5-10k space. What features, performance, etc. would you expect?
Things look very tough suddenly in the low power device market, with a growing collection of very high performance items coming from China. These items might not be SOTA but they are more than good enough for the job, which leaves very little room in the market at the lower reaches. There are still people who want exceptional performance, pride of ownership , luxury feel and longevity, and are prepared to pay for it, offering that, whilst still offering the DIY kits that ground the prices would be a unique offering. So my best guess is add up market to the range.