Hi Boris, welcome to Gearslutz
I usually use iZ RADAR conversion (Classic 96 cards) and/or Sound Devices. I review quite a few interfaces for Gearslutz including the
Apollo x8p.
Prior to the review I thought the Apollo might sound homogenous; my experience is that each manufacturer has a subtle 'family' sound that permeates all their products (due to differences in design, manufacture, and components - even if the same chips are used) and Apollo is no exception.
You may not like the Apollo sound and that is a fine decision and you should stick with your instincts. I cannot criticise you for reaching that conclusion. You may prefer other manufacturers sound.
Another perspective is that time is needed to acclimatise to the relative strengths and weaknesses of a new audio system - this has been my experience across a range of conversion. I needed to adjust my workflow (in terms of timbre, colour and tonality) to find a sweet-spot. If an interface is fatiguing, then that is a serious issue....something is wrong.
One question: with the x8p, how do you feel about the different sample rates being on different chips? Is the even or odd sample rate more preferrable to you?
Best, Arthur