The processor that carries the HP ZBook Studio G3 Mobile Workstation (ENERGY STAR) it is perfectly acceptable, even though it is not the best, it will hold all the work load that you put on it.
More exactly it is the 263 of more than 1,100 processors.
Oh and be aware, if you're still using jack/mp3 connector, this model DOES NOT have it.
With that weight, more than portable, it is draggable. As long as your intention to move it does not pass from the desk to the sofa, it will do.