Just my opinion....
You're going to be levelling up pretty quickly if you play often, so you're going to be opening up a whole range of drivers in the very near future. If you have money to burn, you could opt for the Tour Plus 10.5 driver that is available at level 6, although it is a bit pricey. This driver will do you all the way up to Master tier tho, at which point you WILL need to upgrade. Not before tho.
If that is out of your price range, then the Burner SuperFast 2.0 at level 11 (2/3rds the price of the Tour Plus) has almost the same rated distance (2yds difference), although the Burner has a faster meter speed which might not be to your liking, so early on in your WGT career.
These 2 are the most reachable in terms of you levelling up and being available to you soon, and both will also last you until Master tier, which is quite significant. You just have to pay a premium to get your hands on either.