I posted in your other thread, but my recent experience with the 455/YJ combo was quite impressive. To Tom's point, its all in what you're trying to accomplish. But I was actually set aback with the performance. And I KNOW this pump is a lil tired, but to be honest, this thing, as bad mechanically as it seemed, outperformed my old Biesemeyer 21' with a 460/Berk combo. by a LOT!!