The one thing I would do differently is?

[Snappy]

If I could have a "do-over" I would go at least 300 gal and get 400 w MH's right off. I would also build a fish room before I added the first drop of water.

[BCOrchidGuy]

I would have built my overflow box big enough to get my hand in, thought about room under my cabinet better as it's difficult to work in. I did go for excellent quality light and it's paid off, I like the size of aquarium I got this time, I've had bigger and smaller but I like this one. I would have spent more time sizing the live rock, it's hard to clean around it where it touches the sides.
When I first started I didn't use a QT tank, and I overstocked seriously. Now I QT everything, corals fish etc... I don't over feed and I don't over stock. My 60 gallon cube has 3 clowns in it, a few shrimp and a number of snails. It's a year old and I will soon be adding a fox face for algae control.

Doug