well, since you asked... here are a few of the setups I have ran through the last few years. None of them are close to approaching the difficulty of the setups I posted above. I would say all of these are achievable to the average hobbyist with some effort and knowledge.
What's that really grassy looking plant in the 4th picture (on the ground). Is it high maintenance?
30g Long Frag Tank
3g Pico Reef