"IMO, you have exactly what you need to get to Legend", i'll second that.
You can consider the L79 SLDR driver, since you will need at longer driver later anyways.
The Versa L70 putter is really great, but your current Rossa is great too.
Next purchase could be the L85 Nike irons which again will last a very long time.
Wedges are fine for now, specially the 64 is a gem
Stay with the WGT Tour SD ball ( i still use the WGT Tour SD as Legend), if you can manage the meter, and use the money you save to upgrade your equipment.
Just my 2c
/Vinnie