OK, so I made some inqueries and it will cost me about the same to purchase a HOB
overflow as it would to drill the tank. Well, it's a bit cheaper to drill the tank, but I have to factor in the hassle of finding a way to bring it to the glass shop (which is about a 40min drive away). The tank won't fit in my car and I don't have a trailer, so I would need to organize that too.
I'm going to purchase an Eschopps 1200 overflow box (waaay more than I need but I would rather have as much option on the overflow as possible). I am also looking at an Aquaticlife submersible pump at 750GPH. It's a good 450GPH less than the maximum rating for the overflow, so they should be a good match.
As well, I am going to grab an Aquaticlife MH
fixture with two 150W directional bulbs and T5 actinics (it has a built-in timer to control all the lighting - MHs, T5s, LEDs)
For a skimmer I am looking at a Coralife 125 (should be enough for a 90G + 20G sump)...which is good because it will *just* fit under the cabinet.
Can anyone make a recommendation for salt mixtures? I'm thinking of InstantOcean, but there may be better ones out there.
Once those arrive and I have the tank cleaned, salt mixed, and water in the tank I can start the system and then worry about powerheads and Live rock to help cycle the tank.