I'm a very happy crafter now, with plenty of room for the whole line of Copic Sketch markers (334) PLUS the 24 Spica Glitter Pens! These make my markers easy to access, right in front of me on my desk -- since I use them on just about every crafty thing I make! Remember, you can purchase the "towers" individually, to match up with the amount of storage you need.
My QuicKutz Magpie unit on the left is now holding ink pads within easy reach: Memento full-sized and Dew Drops stored in QuicKutz die containers (color coded with buttons on the front), Ranger Distress ink pads, and adhesive in the drawer. You can also see here how many more markers the Color Cubbies can hold vs. one Magpie.
I hope the photos help you make your Color Cubbie decisions!