Laptop building sites?

So I'm about to go on a 6 month deployment to afghanistan (fml) and I'm going to need something to keep me entertained during my free time as I fly on cargo planes so I have lots of free time while we wait for our next mission. My current laptop can't really run much (no graphics card, runs minecraft at 25fps) so I'm debating if I should blow some money and get a decent laptop. I already have a solid desktop but I figure it would be nice to have a quality laptop as well. Does anybody know of a good site where I can pick the parts I want for my laptop, or is the best option just to buy an already made one on newegg with the specs I want? I'm trying to decide if its worth my money to buy one or just suck it up and bring my xbox? I'm thinking about justifying it by buying a laptop with a nvidia card so atleast I can use it as a rendering machine. Any input would be pretty sweet, thanks.



go for a toughbook