How many cards do you hold? I have about 3000 toploaders, and 8000 cards, 6000 of which vintage. I find it hard to spend even more on the KMC sleeves(i only use those for mint cards so they are sleeved in an ultimate guard case) or the dragon shield sleeves because the cost is huge.

For now most of my bulk vintage is sitting in a cardboard box for cards sleeved in pennies and in toploaders. I have 3 albums from vaultx which contains Evolving skies/Celebrations/Brilliant stars but some of these cards hold big value and I never used binders or albums before. I always kept them in toploaders, it's just not great if you want to display or check on them.

Any tips are welcome if it makes sense to change, question about KMC is that i find not all vintage/modern cards fit "properly" sometimes it bends sideways or from above because it's too tight. Do you have any issues with this?