Well based on your needs, I think this would be a really good choice:http://www.amazon.com/ASUS-U57A-15-6-750GB-Laptop/dp/B008QAPH0E
Very well-built and also light and thin. A powerful CPU with HD 3000 graphics which is not bad at all. Still, if your 3D works are heavy, then you might consider this:http://www.newegg.com/Product/Product.aspx?Item=N82E16834152378
This is MSI CX61 and you can find a deal around $650 I'm sure. This thing is really good both for heavy processing and even some serious gaming. It is also very well built with a brushed metal body. A very good machine overall. You can trust me, I own one.