check the godfather of alps Chryosran22 (Thomas), has tons of info/demos of alps
usually the roomier the case the beter the sound, usually the more solid the case the better the sound. there are fixes for spring/plate "ping"
I have the
Lunar [AEK] and the AEK64. Both are heavy, thick integrated-plate keyboards. My take is that with tactile and linear Alps, it's best to go with lighter, more flexible plates (ABS, CF, etc.) and heavier cases,
or heavier plates (stainless/brass) with a lighter case (polycarbonate). The latter mimics what Alps used for all Bigfoot-style keyboards like the AEK/AEKII's, SGI Granite/Beige, AT101 etc.
I'm not sure the case size or bezel size have much to do with it.
Unfortunately, the Lunar and AEK64 don't really fit into either of my aforementioned plate/case combinations. Still, when I built my Lunar, I used SKCM oranges, and I like the result a lot. I used some dampening material inside the case, and that helped reduce some reverb nicely. There's still some ping, but that's just how it is with heavy integrated plate keyboards. The AEK64 I purchased came with brown Alps, and it was incredibly harsh, both in terms of feel *and* sound. Clicky Alps actually pair quite well in those thick integrated plate keyboards, as the cases tend to amplify the click leaf actuation. I tried SKCM amber and blues in my AEK64, but ultimately settled on blues. The ambers were fun, but like SKCM browns, I don't think I would want to daily driver them (they're so heavy). Anyways, I still put some dampening foam in my AEK64, just to take some reverb out.
TL;DR:
* For tactile/linear Alps, light plate with heavy case, or heavy plate with light case
* For clicky Alps, same as tactile/linear, but thick integrated plates work well too