Hi Tenmus,
One of the advantages of the Verdier, I have found, is that it works well with just about every tonearm with which you might want to pair it. For example, I have had success with the VPI JMW-12, SPJ La Luce, and Graham 1.5t. [FYI - I am currently running the SPJ and VPI arms, with the Crown Jewel SE (basically a Shelter 501 Mk II) and will be installing a Zyx Airy 3s-XB]. Thus, I would place more emphasis on matching your Shelter with an appropriate arm.
I do not think you could go wrong with the Graham 2.2, but would recommend you check out the VPI 12.5 Signature - the VPI is the least colored arm I have used with the Verdier. I have also heard that the Verdier/Schroeder Reference is a stunning combination, but I have no personal experience with it.