Thanks Vass - you'll have to stop by and check it out once I get it stocked with the Festae.
As far as flow....it's hard to say what my actual flow is. The Quiet One 4000 pumps are rated at 725 GPH at the head height of my setup (a little over 4 ft). Both pumps are running wide open, and they are not surpassing the flow rate of the twin 1" drains. The spigots used on the drains is actually restricting to 7/8", meaning I should be seeing a maximum of roughly 525 GPH per side. My overflows suck a little less than 20% air through the drain hoses (based on the air to water ratio in the drain tube during operation), which means that I'm getting roughly 850 GPH turnover total through the drains.
As both pumps have an estimated combined flow of 1450 GPH at the head height and I'm guessing I'm seeing half of this, I'm going to guess that the 1017 GPH rating on this pump is a bit "optimistic". In comparison to the Mag 9.5 on my 90gal reef tank, it seems that the mag pump is moving more water than the QO4000 pump at a head height of 4 feet. I haven't done any true scientific testing of this...these are just my observations I've made over the past few weeks.
This really isn't a huge surprise to me; the Mag 9.5 is rated a lower flow but is still using almost twice the wattage of the QO4000. Being that both pumps are of a similar design and the mag drive pumps are pretty close to the rated values, I just can't believe that the QO pumps are really that energy efficient. None the less, they are considerably quieter than both the Mag 7 and the Mag 9.5 I have, and the price was hard to beat. Still a good buy IMO.
So....in conclusion, I'm estimating a total flow of about 800 - 900 GPH. That's still a 4x turnover rate per hour, which I can deal with.