Re: DX 10 question. Not using very high settings
dx10 has 2 benefits i know of that can not be achieved under dx 9, however im not sure if they are tied to very high settings, u would have to test and compare.
1. less foliage aliasing
2. no materialization of objects.
if i had vista id test for myself but i dont
edit - forgot to mention that even with hacked very high settings under dx9 u dont receive those 2 benefits.