I think that the Denon will be okay with that 22k loading, but not at its best. However, the sonic changes may, or may not be to your liking. Only you can tell that. I don't think it will destroy the sound, only create a little more air, and a rise in the high frequency response. Some people like that sound. I still think that the DL103 series will give you the best sound in your price range, even if it is not loaded exactly right.
The Benz PP1 is a very good unit, but it has a limitation in this area of loading. If you continue with the low-output MC cartridges, it will be a continuing cause of consternation, because you will not be able to load your cartridges properly. If you want to only use the Benz cartridges that are designed to work in this loading, then you will be ok, but I think that there are alot of cartridges that could provide better performance than the Benz, and they will need different loading. I personally think that the high quality Japanese cartridges are the best ones going, and they need loading around 100 ohms. You may want to contact Benz, and ask them about this problem, and see if they have a recommendation of how you can make changes to this loading by possibly using resistors parallelled across the input terminals.