i won't be doing the installation myself. i'm having my LBS do it.
it's just that i don't know anything about isis, xtype, external bb and all this other technical jargon.
i just want a nice crankset/bb so that i can change it to single ring and add the e13 chainguide/bashguard.
i'll see if anybody else replies to this so that i can get a feel of what i should do.
i do mostly urban assault and the drops i go off are as high as that will take me (tables, stairs, ledges). on the weekends i may hit a trail, but rarely.
hope that helps in helping me out.