I am confused which laptop should I buy. I am an above beginner in blender. Can you suggest which is the best laptop for blender around $1100.
Unless you need the portability, I wouldn't bother with a laptop. Their CPUs/GPUs are optimized for battery consumption, not performance.
If you only want to use it for modelling, buy ample amounts of RAM (8GB+), a decent CPU with good single-thread performance (most modelling, I think, is single-threaded), and then throw the rest of your money at the GPU (OpenGL3.3+ compliant, of course).
If you're going to do heavy sculpting, go for 16-32MB RAM.