I've tried most of the Cherry MX switches, Gateron yellows, Topres. I like Topres the best but want to try something different, so I preordered some Holy Pandas
The heavy metal GB looks good but I want something light, so none of the metal materials. The material I'm eyeing right now is FR4 but non-metal cases with a HHKB layout seems hard to come by, so I'd be happy with anything light I guess.
For my PCB I'm trying really hard to find a wireless USB C board. The very few I've found are all out-of-stock, like BIOI G60BLE. If I can't find one I'll have to make do with something like the HS60.