I am riding an Orbea Onix and may sometime want to move up the line to either an Orbea Opal or the Orca. Their web site says that the Opal is “team issue” and that the Orca is the lightest, stiffest frame they’ve ever built. The Opal can be had for $500 less, coming within 4 oz in weight of the comparable Orca. The shop expert says that Orbea advised that they carry the Orca, but not the Opal – because the Opal is so stiff, people would not like the ride. Any thoughts, comments, whatever?