So after a wonderfull visit to the Omega Boutique in Costa Mesa aka South Coast Plaza, and trying on an 42mm 8500 my buddy has made his choice. He also tried on a 2500 45.5 at Tourneau but the proportions didn't work on him. He has not tried on a 2500 42mm but he likes the ceramic bezel, which was my choice, but the thickness on the 8500 is not an issue for him.
So now on the hunt for a 42mm 8500 ceramic dial for him, sending out feelers to the regular sources.
Side note going into IWC and JLC he was very surprised how nice all the salespeople where and he found it an interesting experience. Rose gold Atmos clocks are drool worthy trust me next to the silver there is no doubt...
Also the OB offered unprompted to switch my 3313 clasp over to the new adjustable one for about $120... I might have to take them up on that.