The Clevo D900T machines with the X800XT:PE are faster than the XPS 2, the D900K's with the FX-57/X2 4800 are also faster although I've not seen any actually delivered yet. I'm just pointing this information out, my personal preference is to the XPS 2 simply because it offers plenty of power but not at the cost of eeverything else, the noise, weight and size are all reasonable.
I'm glad the M170 is the same as the XPS 2, I don't want my machine 'replaced' already

John