The only bottom bracket I ruined was an ISIS unit that was submerged at a point in its life and it still spun fine for a few hundred km. The only other ruined ones I've seen are ones that are exposed to salt water from our winter roads here. I'd honestly expect any decent crank and BB to hold for 10,000+ miles. It doesn't seem like that much and there are lots of folks riding many more miles on plain old shimano units of all kinds. I'd avoid anything that wasn't square taper or shimano-style external, since those are by far the most common types of bottom brackets. If you do your own work and wanna carry tools the ones for external BBs might pack easier.