Ryan,
I find it funny to see you say that you have been using Oceanic for a "long" time. It hasn't even been available for that long.
My personal favorite is Tropic Marin, it is all that I have used for over 5 years. I use it on all of my tanks at home, ones I maintain, and it is all we use at the shop. I feel it mixes well and quickly. Has a higher quality content, that after mixing is closer to the standards I want in my tanks. Plus, since I am in tank water (my arms anyway) all day long TM irritates my skin the least out of all the salts I have dealt with. IO really does a number on my skin.