I would go with an iMac if you already have a laptop. I've always had windows laptops but I love my Apple accesories. Tbh I would switch to Apple in a heartbeat if
1- I could afford the iMac I wanted
2- Had the space for a desk in my bedroom. (I have a big bedroom but no corner space)
Well one of my cousins recently bought the 13-inch Macbook pro Retina for $2700. He says it's a powerhouse for gaming. He said he also chose the 13 inch because after seeing all of the overheating issues from buyers for the 15 inch online.