I live down the street from global and have shopped at both places multiple times. Like Gboy66, qt is recommended. Jans has a lot of cool stuff, including stuff that doesn't survive very long in most tanks, like feather stars. If your buying there look closely at what your buying, mandarins are usually always starving for example. Prices arnt the greatest but the selection is better then most LFS. Global in my opinion isn't that great. They usually have more fish because its a warehouse/wholesale looking place, but they seam more interested in making money than the health of their fish. I've seen them feed goldfish to saltwater fish, which isn't ideal in my opinion. Coral prices are insane too for the common, usually unhealthy pieces they have. The owner isn't very helpful either if he doesn't like how you look. The big Hispanic guy is usually nice but doesn't know a whole lot about saltwater. I usually drive down to mystic reef in riverside for fish and coral. Selection is limited but fish are healthy and frags are cheap. Montclair fish and pets down the street from jans use to be good to until they got a bad case of ick in their system that they haven't fixed, coral prices are decent to for the common big pieces they sale.
Hope this helps