From all that has been posted it seems that V5I is one heck of an improvement. I bought it, and hopefully someday will get it sent to me...my bad for ordering the day it came out. Its rendering capabilities have in the past been better than Poser. V5I should be an improvement on that but, having said that P6 looks to be one heck of an improvement also. Waiting for that one also. I run on Macs also and for one thing I would advise a little more ram. Imho that is the single best thing you can do for CGI renders. Bottom line is that both are new and improved and are just now starting to trickle out to buyers...V5I last week and P6 next week. Good luck! -jay Currently running a dual gig G4 with 1.75 gig ram. My P5 and Vue4pro render times have been driving me up the wall!