Quote - I don't really get this.  What is your reason for sticking with the Poser 4 renderer for this long, and then wanting to switch to some external renderer with a billion cutting edge features?  If the P4 renderer's output is OK then maybe consider getting the upgrade to Poser 8 and just setting your render options to very low settings, rather than all this hardware/software experimentation you're talking about.
edit: this is a completely serious suggestion and not anything but.

I use the Poser 4 renderer because I don't use alot of the features that are enabled with FireFly. Most of my stuff is map based using mixed lighting with a bit of specular effects; nothing fancy. Honestly, I like that Octane is fast, and that I could render with proper effects at a speed better than I am at now. I just want to render my scenes faster.

I have tried using the FireFly renderer a number of times and it seems slower and I find it tends to blur my maps. The lighting looks alot better, but I'm not too hung up on that. If I did switch to Poser 8 or Poser Pro what kind of rendering speed increase could I expect? I have thought about it, but I was always under the impression that the rendering speed was only marginally faster and had more to do with the hardware you were using rather than the program itself. I mean if switching to Poser 8 will make a huge difference than I am all for it.