Burt,
Not aware of any other factory upgrades you ought to opt for. You are in for a treat---I'm sure your new Di's will deliver the goods!
The only other thought might be what footers you opt for. Many different options here.
I remember how hard it was to order up a $3300 speaker I had never heard. In retrospect, this was the biggest no-brainer purchase I have ever made. Please let us know if you feel you didn't get your monies worth! (or, more likely, how much you are enjoying your new speakers)
Not aware of any other factory upgrades you ought to opt for. You are in for a treat---I'm sure your new Di's will deliver the goods!
The only other thought might be what footers you opt for. Many different options here.
I remember how hard it was to order up a $3300 speaker I had never heard. In retrospect, this was the biggest no-brainer purchase I have ever made. Please let us know if you feel you didn't get your monies worth! (or, more likely, how much you are enjoying your new speakers)