I wouldn't even think about a Red Sea Max unless you're heavily into DIY projects. Red Sea stopped making them (and supporting them) about five years ago, and it's just such a hassle getting spare parts anymore. I bought a used RSM 250 in January, and it's certainly a good-looking tank with the matching stand (I have the original with curved corners), but it suffers from design flaws and operational challenges. The tank runs hot, and you really need the water cooling fans or a chiller to be operational during the summer. Unfortunately, water cooling fan units are impossible to find -- I had to buy a huge lot off of eBay for mine -- and the original skimmer pump dumps excess heat in the tank. I no longer use a heater in mine, and it's still a constant 26-28C.
I've now brought my money pit up to a decent operational level, but I'm up to about twice the price of the original unit ($600 CAD) with upgrades. That's still about a thousand bucks cheaper than an equivalent Reefer or Waterbox where I am, but it's come with hassles galore.