I'm gonna be setting the 60g soon so I've been researching like crazy. lol
i take it the tank is not drilled? You will need an overflow box with a siphon to get the water down to the sump. I wouldnt try to use the aquaclear, too many variables. just get a good old overflow box kit. How many inputs do you have on your sump? When I started my 125g i went with a dual overflow which meant I had to use a dual input into the sump. But I bought all that stuff for a 220g so I'll be ready when I upgrade. If youre only going up to a 75 in the near future you can use the equipment on that.
If you have a single overflow going into the sump then its on average 600-800goh that it can handle so you would want your pump just a bit higher than that. A mag 9.5 would push 950gph and after head loss that number should be around 750-ish. I use a ball valve on all my tanks so thats a good idea. you can tweak the flow with that.
Hope that all made sense. lol