I have a REF 1 and I find the soundstage too imposing at times. If the Ref 2 has even greater dynamics I would probably NOT upgrade as I will probably find it too overwhelming. But judging from the new design, with tube rectifiers the sound should have more bloom and be less glary and perhaps more laid-back. Of course careful auditioning is a MUST before committing to the mod, as this is mighty expensive and not just stuffing in a few infinicaps.