A 55 is a great tank. I love my 55 reef. I would avoid the lionfish and the snowflake. You end up with your hands in a reef all the time, opening you up to get bit or stung. But that is just my opinion.
To get a similar look, the engineer goby would be a great fit for a 55 reef. I had one in my tank for a short period of time and really enjoyed him. As they are more peaceful, this will open you up to many other options for fish in this size of tank.
Check out liveaquaria.com. They can help you narrow down appropriate choices for the livestock you like and what will be able to live together. They have very accurate recommendations for tank size requirements.