I will go off on a tangent here, but I had a quick look at your equipment - great driver and irons but before a new ball I would upgrade your wedges (3) and putter.
In the UK credit offers seem pretty good, so take a little time to do these if you are not willing (or can't afford) to put some coin into the game.
At masters tier and your equipment I do not see the need for any ball better than the Cally L33 - should be manageable, especially after using the starters - and a wise tip from HP re using a starters to trick your mind into the speed of a better ball - I hear even the yellow callys seem slower then :))
I used the WGT Tour SD virtually all the way from master to legend (sometimes I would splash out on the Srixon or the Cally).
To me this game is worth spending a few pennies on as it is pretty cheap entertainment, especially if your ball cost is minimal.