If you still want backlit, in order of quality (comparison is with CM stock keycaps):

https://drop.com/buy/drop-skylight-series-keycap-set
Feels better sounds better

https://shop.tai-hao.com/categories/pbt-dou...backlit-keycaps
Feels better sounds about the same
Also look at their rubber keycaps, pretty good for WASD.

https://www.aliexpress.com/item/40002107363...earchweb201603_
Pudding. Never tried but should be about same feels as CM.

https://www.lazada.com.my/products/free-shi...5938372611.html?

https://ymdk.aliexpress.com/store/group/Key...ad_11129997.1_2

Above 2 are from the same company.
Feels and sounds the same as ABS. They're ok to get if you're on a budget and you're really going after a colorway change.

https://www.facebook.com/groups/MYMECHMARKET/
This is worth a look.

NON Backlit
Drop, KBDfans, ilumkb, zfrontier en,

Lazada, Aliexpress and Taobao have more. You slowly look lah. Most will be roughly same quality like from this YMDK company or worse.

If you're going after feel and sound improvement, I suggest you lube instead. Night and day difference. My gamer friend was thinking of changing board for a while till I lubed his CM. Now he's super happy and content.
If you're going for a change in colorway then yeah go for it.

NOTE: I have tried SA keycaps on a CM board before and they dun fit because of the north facing LED. There's a chance  thicker wall PBT keycaps might not fit. If you can find used Ducky keycaps, they're actually quite good.

any thoughts about mojo68 keyboard?

https://www.kickstarter.com/projects/mojo68...anical-keyboard

the typing test sounds hollow. Likely because of the thin ass abs caps.
it has 2.4g wireless tho.