do you hit your current driver straight?
It would be one thing if your current driver was a relic that wasn't comparable to today's technology, but the Ping K15 is far from that and in my estimation still an excellent golf club.
Have you demo'd other drivers? Do you have any additional specifications, launch angle, carry vs. roll, etc.
I don't know anything about you, height, age, gender, etc. So I can't speak to weather or not 200~210 is a good distance for you. But as a frame of reference my father at 60 years old swings entirely with his upper body and hits the ball in the 190-200 range. If he would take a few lessons and learn to use his core / legs to swing he would probably find WAY more yardage than he will ever find replacing his driver.
One thing I would suggest is that if you are considering spending $200 on a driver, maybe consider spending $200 and get a few lessons to work on getting more speed. You will likely get more distance out of a few lessons than you will out of the same old swing with a newer driver.