Have a look at the ThinkPad T and W ranges (440 and 450). The Dell Precision M3800 Mobile Workstation is interesting but only goes up to 16GB. Does it have to

Have a look at the ThinkPad T and W ranges (440 and 450). The Dell Precision M3800 Mobile Workstation is interesting but only goes up to 16GB. Does it have to be a laptop? A desktop will give you more power, more expandability, a better keyboard and screen, and much better ergonomics for a lower price.