If you're thinking Alienware thru Dell, I might point out that Dell has a outlet store on-line. They sell returned items that they re-certify. I purchased my last Dell that way and have been very happy with it. Typically the units are a little cheaper or have a few extras on them compared to building one on-line. Also, you get delivery (in the states) within a few days rather than weeks as it's already built and sitting in a warehouse in Austin (I think that's where mine came from). The Dell outlet also sells returned business PC's and workstations. I think those are the best deal with multiple chips/processors and lots of RAM. Those sell at a more reduced price as they are number crunchers and less popular than the Alienware line (which is aimed at gamers). I would think for Poser work, you should look at a good number cruncher.

Good luck