More lumens wont change the beam pattern. In fact more lumens with a poor beam pattern may actually give you less usable visibility as it can instinctively draw your eye to hot spots, excessive foreground light, etc. instead of where you should be concentrating.
Also I'm prob just getting old but I wouldn't give up the reliability of OEM ballasts to upgrade to 55w. DDM isn't what it used to be, unless they have improved again in the last couple years. Morimoto is a better choice and probably the only one I would make if straying from OEM. But again the projectors are the real difference maker.
I don't drive enough in poorly lit areas to judge, honestly haven't paid enough attention. And I doubt I would be willing to open up the housing and fab in new projectors to make a real difference.