Well, I bit the bullet and bought an HW-302 for my 46 bow. I suspect I would have been better off with the 303's extra flow, but I do have the media box completely filled with floss, bioballs and ceramic media. Worst case, I'll remove some of the floss and see if flow picks up.
I had no issue priming or setting up the pump. The booklet that comes with the filter from China is pretty hilarious on the Engrish front, but I scored a great deal from a local seller (one day ground shipping is nice) and so far I'm pleased. It'll be running in conjunction with a large HOB until it is will cycled. Since I have yet to dirt and cap this tank, it's going to take some time.
Does this make me #86?