You may have already done this, but if you want some feedback on those from fellow hobbyists, I'd recommend checking them out at www.koiphen.com; serious koi hobbyists REALLY know their stuff when it comes to pond equipment, with the bizillions of dollars they have invested in their livestock lol
Talked to the guy at RLSS and the new DC6000/12000 come out in March. They are controlled by the APEX through the standard 0-10v controller output used for other pumps and LED dimming. definitely going with a pair of DC12000 now. These pumps have been shown to flow 1,000+gph on only 40-50 watts
I have a Reeflo Blowhole BH100 which is a pressure rated pump that has an adjustable watt draw option as well and I do like that option. These Waveline's kinda remind me of it, but I like the options for controlability better on the Waves. The only thing that I would think hard about is rating 22ft rated pressure height. While it's a bit for most, for your application the flow is quickly going to drop by the time it goes through those 4 filters, UV, Chiller and then up to the tank. While lowering the watt draw is a very nice option that will have an impact on pressure performance so I don't believe you will even use that.
If I was in your position I would use a higher pressure rated pump for the filtration and a flow bias pump for circulation. IMO you need to look at 30ft + head pumps minimum to drive the filtration side.