Good setup -- I also keep about 3 REOs locked and loaded with different flavors (fruit, coffee/sweets, cinnamon red hots) and just wanted to comment that you don't need to obsess about which device to use for which flavors; you can easily make changes in the future as your tastes or preferences change.
Make it easy on yourself by buying a bunch of spare bottles, and keep some vodka/Everclear handy -- I store mine in an empty 30ml juice bottle. Drip the alcohol down through the tubing (and in your atty(s)) until it runs clear, air/blow/burn dry, and you'll be good to go with a new flavor. Even setups using the very potent cinnamon and menthol flavors can be switched to new flavors without residual taste lingering if your REO cleaning technique is thorough.
As much as we all love our mods, it is hard to justify buying 20 of them just because there 20 flavors you might cycle through.