Anyone know the best ISIS bottom bracket on the market? I've seen FSA, Chris King, American Classic, Im really tough on parts and need the best, anyone have any experiance with any of these or others? Thanks.

You sure you've seen a King? As far as I know they've never made it to market.

If you are tough on parts stick with square taper. ISIS requires smaller bearings that wear out faster.

I should say, I saw the Chris King ISIS bottom bracket on the web site, not in person. I dont have the extra cash to change the crankset, just the bottom bracket at the moment.

Not sure about the ISIS version, but the Race Face square taper has cartridge bearings that can be replace, unlike many BBs.

I think FSA makes one that has dual cartridge bearings on the drive side, that should be tough.

Do you need a special BB Tool to change out an FSA BB?

not if it's an ISIS, as far as i know.

You don't need special tools to change out splined bottom brackets. and they do use smaller bearings, generally cartridge ones, but the amount of contact surface is the same so they don't wear out any faster... wait, does that make sense? I think so...
anyway, I hate the damn things cause they're impossible to repack (the majority being cartridge units) and the splines get chewed off if you don't tighten it down tight enough, which is REALLY ******** TIGHT (650 foot pounds I think.) <--- thank god for aluminum. grrr....