I got both and I'm using Poser 5 now. I have a very powerful machine and it is starting to slow down as I add more to the libraries and that's still with only one figure, mind you, its a fully loaded Vicki3. I dont' think I will ever be able to work three and four person scenes in Poser 5 with any kind of sanity because it gets so slow-- that's a shame because I really like its renderer. It's a rock and a hard place, truth be told. I have 2.4G processor 2 G's ram-- not fast ram. Lots of virtual, but still slow as molasses. I hate to think what this thing was like before the SR2_1. I don't want to go back to Pro Pack-- which is very stable, but then so far, so is P5 except if I try to cancel a render. The FireFly renderer is good enough that I don't think I can be satisfied with plain old Poser renders any more. Like I said, rock and a hard place. I would like to see an SR2_5 or 3, but that is not this company's pattern. As with Prop Pack and Poser 4, they fix everything that crashes often, and leave the rest of the bugs alone. Emily