Lots of answers here. Question 1 has to be why do you want to upgrade. If the answer is performance improvement; then is it accuracy, distance, or both. Next, how consistent are your shots?
- does your ball move in the same direction with all your clubs. It's ok if your driver moves left and your short irons move right just as long as the ball typically moves in a consistent direction with each club.
- how consistent is your distance with each club. Are you pretty sure you will pick out a club that will make the shot you imagine.
If 1 and/or 2 are inconsistent you probably aren't ready for upgraded clubs
Me. I always buy the hottest trending driver and putter and make sure the headcovers are prominently displayed in my bag. I usually leave my driver cover on while I march up to the tee and then slowly take the cover off and drop it casually on the ground. That way when on the first tee everybody assumes I must be a good player and that the sucky drive I just hit is a mishit and not my usual.