I am about to buy a new pump for my 54 gal. reef tank. The sump contains another 6 gals of water. I am interested in the Pentair Quiet One pump. Which one would be best for my system, the 3000 rated at 780 GPH or the 4000 rated at 1017 GPH? I had a Supreme Mag drive that lasted for years but I heard these run hotter than the Quiet One by Pentair. Any advice would be great! Thanks!