I also really enjoy sounding but I probably don’t do it as often as I’d like just because of going through sterilizing everything to minimize possibility of UTI. The feeling is really unique and pleasurable though! It is definitely a bit more of a niche kink right now, which may be due in large part to the idea of ‘sounding’ sounding off-putting to anyone that has not experience it before.
My first (and only sound so far) is this one from LH. I was a bit worried with it being my first, at 8mm diameter and ribbed but it ended up being fine for me going slow with plenty of sterile lube. Also I like the weighty stainless steel as I feel it helps the sound slide in slowly, compared to how silicone may be which you may need to push in more.