I'm not sure what price is reasonable to you, but if you can, try to find a laptop with Quadro 1000M graphics. If that bumps the price up too much, consider at least an Nvidia GEForce 555M or higher (560M, 570M, 580M) with 1GB of VRAM.
For the rest, min 8GB of memory a fairly large storage option (500GB+ hard drive) and a either a fast dual core, or quad core Intel i7/i5 2000 series CPU. Here's a quick
link [
shop.lenovo.com] to Levono's mobile workstation page to see roughly what you're looking at in terms of features & pricing.