Daragon said:
Note: They are a little more pleasing to look at than Ryan's (Piscevore) tank...
Mostly because you don't have ryan standing next to you.
You should definitely visit a number of tanks before setting yours up. It'll give you a much clearer picture of what you're trying to do, and save you time and money.
You're welcome to visit my tank if you're up in this area. I have a 65g tank with 55g sump in the basement.
As for all the advice your getting I agree with most of it. If cash is tight while you're starting up, I'd recommend passing on a refractometer, digital thermometer and digital pH meter. They're useful but not essential.
A watermaker is a very good investment, but you can also make do with smaller tanks by buying RODI water from an LFS if there's one nearby. Don't use tap water.
The best place for used equipment is right here on BRS in my experience. Prices are lower than anywhere else, and in general the users are very helpful and trustworthy.
Personally, I'd drill your tank, and set up a sump. You can avoid it, but you'll wish you hadn't in a few months. Even small setups are greatly improved with a sump.
For a skimmer, take a look at the ones that Jeremy sells at Coral Reef Aquarium in Seekonk. They have a great price, and look good to me.
Cheers, Nate