You need to measure the inside of your stand. Any tank that'll fit in there will work. Of course the bigger the better. I guess technically you don't have to put it under the tank. I used a 40 gallon breeder to make a sump for a 180 gallon. I got a filter sock holder from bulk reef supply and ordered some 25 micron 7 x 16 filter socks from Mcmaster-Carr. I bought a bunch of seachem matrix and put it in those delicatds wash bags you can get from walmart. Just put the matrix between the inflow and the pump, so the water flows through the media. I'm going to use a Mag-Drive 18 for the return pump. I'm currently still waiting on the aquarium to put it all together. I got the sump idea from the member jcardona1 and it seems like the simplest setup.
I've never used a hob overflow, so besides getting on that will handle the flow you want. Also you have to have your tank a little ways from the wall to make room for it, so I don't know if that's an issue. Someone else could tell you which is the best quality and most reliable.
Okay thats cool there is a guy selling a brand new one on CL near me. this is his post on it "a brand new Eshopps over flow box for a wet/dry filter. It has never been used and it is rated for 1200 gallons per hour or a tank up to 300 gallons. It has two 1" bulkheads and the pre-filter box is black to help keep down algea growth. It is all acrylic and you only need 3" between your fish tank and your wall for this to fit. It has 2 U-tubes to transfer the water from the pre-filter to the back box and through two brand new foam cylinder filters before entering your hoses."
I should have atleast 3" between my tank and the wall I guess I should make a knew thread on this?