I am going to try to stick with my DDC 18W and connect it to a PA2 ultra and a AC flow meter to see how it performs!
From Martins Excel work sheet - comparing the DDC and a D5 gives me less flow with a D5!

Also in another note - I know using "software sensor Tool" you can get external Temperature data to Aquasuite Software. But is there a way to get the Aquasuite Readings(temp/RPM etc) to an external application like Rainmeter? or a windows gadget?