Yeah, I'd have to say slabs and slab sheets are probably the best way to go for you. You don't NEED air-tites and I'll guarandamteeya they won't stay in 2x2 binder sheets well (unless you store them carefully, sheet-open-side up and don't ever touch them - slippery little buggers). So yeah, slabs and slab sheets are a good way to go if you're looking to show off.
But you should pick one up in a lower grade so you can handle it in your hands. That's even more impressive, to me! :)