I'm very close to getting a Max S 650.. I haven't had a tank now for 4 - 5 years and am very keen to get another one going.. I've only had about 2 years experience with salt water but had fresh for years. My last tank broke and is why I don't have one now. Any suggestions? I want a tank that doesn't need upgrades and would be keen to know what people think of the Red Sea tanks or if there is anything better I should consider