I've heard that the SR shifter cutouts can actually allow dirt/rain to get into the internals easier. No experience, just hearsay.

For the cranks, well the Record UT is almost double the cost as Chorus, and that only gets you a 38 gram savings basically. Did I hear right that its from some additional hollowing? The Super Record will get you CULT ceramic bearings.
A Chorus crank with CULT bearings bought afterwards would still be less than Record.