Just a note for those of you planning to purchase one of the new Personal Reference ESVs and then have it rebound. The genuine leather edition is the only one that features a sewn binding -- the TruTone editions have adhesive bindings. So the edition you want to start with for rebinding purposes is probably the genuine leather one.
UPDATE: Matt Morales spoke with someone at Crossway today who said that the Personal Reference edition would also feature better quality paper than previous editions. Presumably that means it will be more opaque. We should find out soon enough.