IMHO, DAZ Studio isn't going to be a serious competitor or replacement for a couple of years yet. I bought Poser 5, followed the installations in Poser Pros stickied topic in the P5 forum, installed the SR4 and killed the Content Room before even opening it, and have been very pleased with it. I had been planning to use P4 for most work and then go to P5 for the materials room, renderer, and cloth room, but I was pleasantly surprised by P5's performance and am moving over entirely. On my system, for whatever reason, P5 runs faster. A firefly test render with minimal extra features turned on is about the same time as a P4 render. I LOVE procedural shaders; always have, always will, so now I'm a happy little Fyre-chan to have them right in the program and not have to export to another. Nested folders in the library and extra runtimes is nice. There are some quirks, but mostly just small annoyances to me. I have no qualms about suggesting an upgrade, based on my experience.