CU -- thanks for that advice. i hadn't considered that older carbon might have subtle issues, but it seems pretty obvious now that you've pointed it out. the other thing i learned from my 1997 giant kronos GS is that bike technology changes quickly. what was good ten years ago is probably incompatible with what is available today. so i'm unsurprised to hear that it's not just 9-speed ultegra that is not up to date, but also the fork sizing and perhaps the BB. those are all good details to be aware of.
i added another option to my list, and it seems the most promising thus far. it is a 58cm felt S32 (2006 judging by the color) for $800. that is in the budget and has more modern components. pending response from the seller, that is top on my list.
robb.