Hi Sealtm2, i would say get P5, im running P5, and its a dream, it just the best, Im running it on a AMD 1.1, 500+ ram, with Win Xp, i can not really say a bad thing about Poser 5, and im allso useing all the SR. Man the Material room is so cool, u can do so many things in there, well wish you all the best with what ever you try, cya and take care...