At your current level, I would say the Callaway X Hot is the best driver available. I have never used this club personally, I just based my recommendation on what I feel is the best combination of distance, meter speed, and forgiveness.
Another option - which is the option that I chose after joining WGT- is to keep saving all your credits, wait until level 48, and purchase the Taylor Made R1. Yes, level 48 is a little ways away for you. And yes, this driver is incredibly expensive. On the other hand, after I purchased this club it truly was a 'game changer' for me. I'd say 8 out of every 10 Par 4's are now reachable in two, unless there is a stiff head wind on some of the longer Par 4 holes like at Congressional, Olympic, and Bethpage. Once you get a better 3 wood, then some Par 5's will be reachable in two as well - although sometimes you'll need a good tailwind boost to get it there, and holding the green once you get there is a whole other matter. Additionally, if you purchase the R1 at level 48, in my opinion there is not a better driver available until level 81 unlocks the Ping G20, so I feel like the R1 has the greatest 'long term' value.
So, in summary, I'd rank your options as follows:
1. Taylor Made R1 (Level 48) **if you can afford it**
2. Nike Covert at Level 50 if you can't affort the R1
3. Callaway X Hot at level 31 if you don't want to wait until level 48 or 50
The Taylor Made SLDR and the Ping K15 are two more options to consider, but it looks like your current driver is already at 245 so I'm not sure if the minimal distance increase is enough to justify the cost. Its fine to ask for opinions on the forum, but ultimately I think you should choose the driver with the combination of meter speed, distance, and forgiveness that you feel most comfortable with. Good Luck.