Thanks for the replies everyone!

Sounds like there's no real option for hardware expansion other than a bigger single card.

I guess I'm just asking for the moon if I want to be able to work bigger scenes at full throttle. And maybe poser wasn't really designed for complex scenes in the first place.

The box tracking sometimes gives me issues when objects are inside other objects and the bounding boxes hide details. I'll try ramping down the display mode and hiding objects I'm not using.

The 5770 is fast until I start getting into indoor scenes with 6 or more M4/V4 characters with textures; but as posted above I could simply hide the characters I'm not currently working on.

I suppose even professionals using big time studio work stations still have to use these tricks in their work flow.

I wish there were like a "fast-focus" function where you could select object hierarchies and then just press a button and "hide non-selected" like in 3DS Max. Does such a thing exist in Poser?