You could easily convert that space with a replacement bow window. You could have a picture in the middle and have 2 flankers, either double hung or casement windows on each side.
Typically a bay window would have the floor extended. [hence the term bay]
Just make sure you have low E and Argon gas fillled double pane glass.
If you are handy you could replace the window yourself and save a ton of cash.
+1 for doing it yourself. Not nearly as hard as one would think. And you really do save a ton of cash. Also enables you to upgrade window a tad if that was of interest. We've always had wonderful luck with JeldWen windows. (Menards carries them.) You could do that size window in a day, including trim out.
But if DIY is not in the cards, I've also heard decent reviews for Window World.
Another option: buy your window and hire someone to install it.