I guess it's the quality and rareness. I was considering a set of 18x9.5 LE37k but the same traits that attracted me to them, pushed me away. Considering how much I drive on a daily basis it was not an ideal wheel to daily. My friend bent a 18x8.5 +40 SE37k on 235\40 tires, so chances were I would run the same fate. Sometimes you just can't avoid or see that 1 pothole. Go with the RPF1, already comes in the shiny finish and you can choose the size you want, unlike having to deal with what ever you find with the SE37.