What are you trying to do anyway? I mean, what does your source material consist of? If you are looking for something new because there is something that you want to do that the DLIII isn't capable of, that's one thing; but, if the DLIII does everything that you've needed it to, finding something better might just be a matter of subjective opinion.
The DLIII, although older, still holds its own. I've never heard one with the Cullen mods, but I'd imagine that it's very nice.