Bridgestone Tour XS.
XS gives great distance and with the approach shots, the ball shines. XS holds the greens and short-game spin, you can run it, spin it, and have no fear over green side bunkers.
Nice feel off the putter. Your GIR will increase with this ball. Note: I have played just about all the major brands, Tour, and Tour X offerings.
The Tour XS would fit you current ball section with Pro V1. The Tour X are firmer balls.
Since you using the AVX and Pro V1 which are softer balls. You would find some familiarity with XS; Feel, softness, spin. Bridgestone offers the RX which slow swingers should use but hey we all want to play what the Pros play. So go with the Tour XS.