Play as the greens and fairways firm up - Pro V or major brand urethane - but most of the time Pro V because it is the most popular premium ball.
Winter and play when the course and greens are soft - prefer a "soft" ball - brand not important, but find more Callaway supersoft than any other brand.
I am a member at a links style course with heather lined fairways. I always end up with more balls in my bag than when I started. This is especially true when the pace of play is slow or playing with a few friends who tend to spray their tee shots.