Ive been thinking about this all the time..... They both have there pros and cons.....in my book I think the pros outweigh the cons, I think you have to decide what do you enjoy doing the most, we all get wrapped up with the water changes, and daily maint but sometimes we need just to sit back and enjoy our hard work and remember why we all started this hobby..... I'm not worried about the nasties that may come, there are natural predators you can buy that will eat them, I think in an earlier post someone said it perfectly. I love just sitting looking at the live rock seeing what I can see, if there's any new life or something that I did see before....like finding gold in your living room....I know what my decision is!!!!!