I used Tropic Marin Reef Pro while I was in Cleveland because we had a LFS that carried it and I loved it. I was able to get if for around $55 a bucket which was more than I really wanted to spend but for what I was seeing in my tank, it wasn't outragous. The $75 a bucket I have seen TM going for locally, IMO is nuts. So when I set my tank back up after the move I have been using Seachem's Reef salt and am pretty pleased with its peformance.
From what I have read and heard its not so much the specific salt you are using but its consistancy in the salt you use. You could use the bottom of the barrel salt consistantly and have better results than someone who uses a little better salts but is always changing brands.