The FSA has replaceable bearings, and it's quite nicely made, but an Ultimax Ti unit I used had the most flex I've ever experienced in a bottom bracket. The cranks had about 4mm of clearance with the chainstays when the bike was in the workstand. When I rode the bike, the ends of the cranks were taking paint off the frame - that's how much flex there was. I later read a review in a French cycling magazine where the FSA was the lightest, but also the most flexible on test.
If you're light, you could try the FSA. If not, a UN71/72 is always a safe choice. TA also make very nice units, also with replaceable bearings.