What are you looking for that they don't have at Live Aquaria? It might help someone point you to some other options. I've only ordered from their Divers Den section, and I've been very happy with the health and quality of their livestock as well as how everything was packed/shipped. I've also ordered from Vivid Aquariums and Reef Hot Spot. I won't be getting my first Reef Hot Spot order until Thursday so even though I've heard great things about them, I have no first hand experience yet.
BlueZooAquatics is supposed to be good too, but they shut down for a month recently, and I haven't heard anything about them since they reopened.