Hi there, i'd rather go for a smaller front sprocket (14 instead 15). The transmision will thank you, especially the 5th gear) even for the 3tb model.
On the tarmac at 60 miles por hour, you can use the 5th gear with no problems whatsoever with the 14-44 gear sprocket relation. With the stock gear sprocket 15-45, the engine vibes a lot. Stay safe with 14-44 instead 15-43 or 42