Hi there, I'm looking to buy a square taper JIS bottom bracket; size 68mm X 119 or 120mm. This would be to go in a 753 steel frame. The only options that I've found are : a) Acor bottom bracket Stronglight JP400 in steel (a few pounds more for a lighter one with alloy cups) c) Shimano UN54 All of these retail for about £15 - price isn't an issue. What I would like to know is: Are any of these to be recommended or avoided ? Can anyone recommend any other BB which is significantly better ? (Does anyone have anything better that they'd wish to sell ?) Are there any problems with using alloy cups in a steel frame ? Thank you for any advice/info.