Welp, I feel like I'm stepping into a complicated debate...
I'm all for the 2 watch lifestyle and can see owning an SS S9 + the Ultra 2. But then I'd rather have a mechanical (or several) dress watches + the Ultra.
While I don't own any Hermes bands, I do essentially think mismatching lugs do not look appealing regardless of watch type.
I was happy to find this quality leather band with matching titanium lugs that can dress up the Ultra nicely when I don't want to travel with my bulky Citizen World Chronograph AT. While sporting a suit is part of my travel, I rarely bother taking another watch to dress it up due to the frequency(it is often). Taking a second strap is a lot easier.
It was $20... from a certain Chinese site. Smells wonderful and is nice & supple. Wayyyy better quality than I expected.
I could not in good conscience buy an Hermes band for this watch without matching lugs. Would drive me insane...