By entering your serial number here to find specs for your model. (Be aware that some models can use more RAM than Apple shows. Check EveryMac to verify actual usable RAM.)
Well, you could get a "hi-res" MacBook Pro, but that won't be as high as a laptop with a full 1080p display, which is about as good as you're going to get over in Windows land. You're not going to find anything in the laptop market currently that competes with the Retina display.