What would be a good laptop?

I need a laptop and I would prefer it to be either Dell, Lenovo or HP.

The specs I would like is 6GB and more RAM.
CPU = Intel i3, i5
GPU = MUST be Nvidia, preferable GTX 660m.
Must have a Dvd drive.
15.6'' Screen

Added (1). GPU = Cuda

Added (2). GPU = Cuda

Added (3). Can you please suggest a list of laptops.

Guest

I've always had good luck with HP and Toshiba. You see dells that are 20 years old still going strong though too!

Collin

Go for Asus.

yuva

Lenovo y50 (1080p version). I wouldn't look further. It's the best choice for you.
I gave you this answer, because you won't find 860m with i3 or i5 processor.

WhiteShadow