I use two pc's. Old one (5 years old) for main pc and new one (3 years old) for rendering.

    New pc is 64 bit with 16 GB ram.  4 hard drives. One with XP-pro, one with Win 7, and two with total of 2.5 TB  space for data.

     So far, this has worked well. Recently had new pc reformatted on spare drive with the win 7, and I hate win 7! Mainly because I don't want to use mail system that comes with it, and I can't let go of Outlook Express.

  As long as these systems work for me, I'm a happy camper. I don't like learning curve on complete changes of OS systems and programs, which is why I hate DAZ 4.5, and I'm still using DAZ 3.2.

 Some changes are good, but when RR changed to new site design, I didn't like the garrish colors and I'm still trying to deal with it.:(