Laptop Spec help

So my laptop is a decent laptop and i can run virtualdj home free, and DJ intro. But my computer usage is very high so I wanted to change the stuff in my laptop around so that I can run fast and flawlessly without any lag. So What are the specs that should be on my laptop. (I am building this myself so if you recomend any pieces please take the price into consideration.) Lastly for a hard drive I intend on getting a solid state if that is any information that should be useful to you.

Stank ya smelly much for your help!

P.S. If its any consolation I am going with be working with the Traktor Z2.