I don't know about the GP, but the BE can still be bought with a greaseable spindle. That's literally all my local distributor sells. I have never used a hammerhead but I can tell you from experience, the BE with the greaseable spindle is a good bang for the buck. In 3 years I have had to have minor things done like replacing the bar a couple times, and replacing seals a few times, but the spindle is still going strong. I don't know if it cleans as fast or works as well as the whisper wash or other brands, because I have never had anything to compare it to. But I would say for I definitely got more than my money's worth. For $350 you can't beat it.