Quick update: I pulled the trigger in the following to test out:
1. original 90mm f/3.2
2. Pentax 150 3.5 manual focus + adapter (recommended on another forum as a great value) $300 total
3. Hasselblad V 150 Sonnar CF f/4 + XV adapter, the 180mm had better reviews, but wanted 150mm...$700 total
4. Rogeti L bracket: wish it were black, but like the small light weight design,
I should have the Pentax 150 and 90mm today...will be a couple days on the V lens. I suspect that my preference will be the V lens.