I have not had a problem with premium aquatics. bethnjeremy is right that Marine depot is faster at shipping, usually about 2 days faster. It's kind of like Walmart of marine aquariums, we have to support the smaller businesses or the large ones take over. The company I would NOT recommend would be aquacave, they have caused me a bit of head ache. The first time I dealt with them I though maybe it was just a bad experience that wouldn't happen again, but I tried them again to experience the same thing.
As far as your flow goes, If you want to use a wave maker you should either go maxijets with sureflow mods, or an mp40 will surely make you happy if you have that kind of spare change.
If you are not setting them up on a wave maker (which I am strongly opposed to, I truly believe chaotic flow is the key to success.) I would recommend koralia 3 or koralia 4's depending on how much flow you are wanting.