Best lens for portraits with Nikon D3200?

So I currently own a SIGMA 180-200mm ƒ/3.5 lens on my Nikon D3200
I want better lens FOR PORTRAITS but since i have a crop lenses i don't know what lens are the right ones to purchase, i thought about the [Nikon AF-S NIKKOR 50mm f/1.8G] will it be good?
I want bokeh which means i need small amount of ƒ stop, yet with a pretty low price like these lens
What do you people recommend?

Yes, the 50mm f1.8G is a very good choice. Just the right focal length for DX crop sensor, too. And its price can't be beat. I use that lens for portraits, myself, and it's great!

It's a good start point, though. If you have a little more money to spend, and if you want to expand further after buying the 50, consider the 85mm f1.8G.