The 6500 is sort of legendary, I can personally atttest to the fact that these things last forever. That said, I've had good luck with cheaper no-name brackets. If you plan to use the bike for touring, or if your rely on your bike to get you to work in the morning, I'd go with the 6500. Then again, bottom brackets usually don't fail; they just get progressively grittier. If it breaks down(it probably won't for a while), you could just buy a new one and still have only spent $50. You would have to install it, which is a chore... So, in conclusion, I don't know. Do whatever.