I have an ISIS drive BB. Go through the BB every 6 months max. 220 lb trail rider. I have tried FSA, RaceFace, and Truvativ BB's. Now have play in the 4-5 month old Gigapipe. Are the outboard cranksets worth the money or just go with another BB. I was looking at the RF Atlas X type. Can get shipped for $250. I can get a BB for $50 to $100. Crankset equals new chain rings though. Ah, but then I see myself getting a new chain and cassette. Hmmm, but if the RF with the bearings on the outide will actually last awhile???? Then there's the question - RF Atlas or Shimano XT crankset with bearings on the outside or maybe FSA'a new version. Thoughts/comments?