Got the 12.0 for 200eur off Amazon. It's amazing in every way. I had R1700t before. If anyone is reading this and wants to buy R1700t, just don't, save for this, trust me.
Diamond 12.0 > Aiyima A07 > ifi zen dac v1
I thought because R1700t had 4" woofer, that this would also sound bad and lacking in bass. Not the case at all, the bass is really nice and well done, the bass actually is in soundstage now if that makes sense, bass is right in front of me even at very low volumes and it sounds just right, whole other league from edifier. It's definitely not a subwoofer bass, not even close, but it's really good for what it is and reaches lower than edifier. Edifier sounded wrong, this sounds right.
One major thing from all my other audio gear, bunch of headphones, iems, edifiers. The high frequencies like hi hats and the like, are not piercing or fatiguing in any way, they are just right. So now I have great bass I enjoy and great high frequencies, something I never had before. But thats not all, mids are amazing, it's like a really good in ear monitor but with huge stage and amazing imaging, big sound. This are my first good speakers.
You were right about 12.2 being too big, 12.0 is already decently sized for desktop use.
One thing though, vocals are bit quieter than I would like, but I don't think it's a dip but just flat fr, I had similar experience with flat iems. I just probably prefer more forward vocals.