To the OP: I'm with bigbossman here. If you are committed to a modern 130mm drivetrain, have the rear end spread. That bike is good enough for the "no compromises" treatment.

I have had good frames spread from 120mm (531 frame) and 126mm (SLX and unknown but high-end mix) to 130mm. In all cases, I let the pros from Dover do it. At the same time, I had the overall alignment checked and, if needed, corrected. It has never cost more than $50 for the whole enchilada. It would be more if there was a signficant alignment issue, but not more than another $20 or so.

For a top-drawer C&V steel beauty, this strikes me as dirt cheap insurance that the job is done right and that everything is in proper alignment.