I tend to leave my home processed transparencies in strips nowdays, as I rarely use a projector, and strips are as convenient for scanning and storage. In the past I used mainly GePe mounts with a GePe mounting press...they used to make a great variety of sizes, both glass and plastic, not sure what they supply now.
I've never found mounting slides too tedious ( put some classical music on in the background)....just needs reasonable care, try to avoid any dust.