norm1153- I don't think you will have any problems with your system. Sounds very good- E-on recommends ATI (like Radeon) or nVidia (like Geforce) graphics cards for best results. Plus, make sure your software drivers are the most current- the new Vue 5 Open GL is HUGELY better that Vue 4's. I'm using a 256MB nVidia Geforce on an Athlon 64 and have to admit its very SMOOTH SAILING for me in Vue 5. As for Dosch- it was also nice of E-on to include a great free Dosch HDR file with Vue 5. Quite frankly I completely skipped over that one for over a week before finally trying it (ChromeStudio) but it has become my favorite. In fact, I just purchased the complete Chrome Studio and Skies sets from Trinity3D- good price- $107 a collection. I feel they will pay for themselves pretty quickly with some of the things I now have in mind for HDRI in Vue 5.