for the first mkb, i suggest you try out the 3 main cherry mx switch types in a shop that has demo units first, i.e. linear red, tactile brown, and clicky blue, to find out what you like most.

for office use, the better choices are usually red and brown imo (literally more quiet than blue). for home, just use whatever you like.

if possible, look for boards from filco and varmilo. if it's not possible to get these two, you can try ikbc. (e.g. ikbc c87/c104; filco majestouch 2/ninja; varmilo va87m)

currently there are some good used boards at https://www.facebook.com/groups/MYMECHMARKET/ (filco, varmilo, ikbc) for a good price.