i like the idea of the snowflake eel, you just have to make sure there is a secure top because they are jumpers, otherwise the fuzzy lionfish. the only thing about the fuzzy lionfish is that they don't swim around much they tend to just sit on things, so you might find yourself with a fuzzy that sits on corals a lot and maybe irritating them.... but iether of them should be fine for your reef, but there are those very rare occasions that you get an aggressive snowflake..but ive never ha done