I've been a Pro V1 player for years and really don't have any desire to change balls since it seems to fit my game quite nicely. I also am in quite the overstock situation of them! Every year for quite a few years my dad would buy me 6 dozen Pro V1's for Christmas, playing 65-70 rounds a year and losing a ball every other round on average has me with a stockpile of about 14 dozen.
However... I did forget to reload my bag once, and had to swipe some Bridgestone B RXS from my dad, and I ended up playing it for about 12-15 rounds since I was on an absolute heater and didn't want to give myself any bad luck.
About $10 per dozen cheaper than Titleist Pro V1 here in Canada, terrific next option for a premium ball.