IMO, the X2 3W is FAR superior to the Ping in both distance and precision.. also plenty of stopping power with a good ball.
I bought the Ping first.. hated it. Tried the X2 on a free rental w/e and bought it straight away.
I also have the L79 SLDR and LOVE it..
IMO, You don't need another driver until you get to Legend. I used your R1 until I got there.