Yeah, Rare Oceans were moving premises, but I believe some other aspects of life have intervened, and this plan may now be on hold for the forseeable future. They closed the old shop, then seemed to spend an age getting going on the new one, and I guess it could be a good long while yet. Can you not just ask some other LFS to order in any other fish you like? Surely they all just use TMC?
On topic:
Biggest mistake I made with my tank was complacency. It was going really well, so I figure it can handle a week without a water change, or I change my Rowaphos a week later, bang, tank wasted. If you hit a good rhythm, and the tank thrives, there may be a correlation, so for the love of God, keep it up. Learnt that one the hard way, and it has driven me off keeping a tank for the time being.