Hope they More Reliable Than The Old Model...
I Am currently typing on a 7720 dell precision and compared to the M4500 it replaced it has been $%*& I have had 2 motherboards and 1 dimm fail on me in about 18 months, and this is pretty consistent with what the rest of my team's experiences!.
Compare that to the M4500 I used to use which never had a hardware fault and I am fairly confident that you could drive a tank over and be fine, it is a total turd!
Not holding much hope out though as it just looks like a refresh rather than a redesign.