Willie Nelson is one guy who has made use of a gut string guitar in folk/pop context. It is a different sound and distinctive for him.

My suggestion is to hold on to what you have until you find something you like better (sometime even after, but more on that later). If you have some good music stores with a large selection of guitars, set aside some time to try on some new guitars. A good music store will let you sit and play for hours without bugging you to buy or move along. Play a lot of different types. Listen to the subtle differences between them. When you fall in love with one is the time to buy.

If you can get the new one without selling the old one, do that. You rarely get enough in exchange for a good instrument. And, boy do you end up kicking yourself when you realize that it was just a case of the grass being greener. . .

Good luck with whatever choice you make. There are a lot of possibilities and with nice guitars, they're all good.
Bart