Yes gear comes first. For most people the greatest weight reductions are there and its less expensive. Once you've had a good go in that direction you might consider the bike, but it's a big investment and I wouldn't recommend that anyone buy a carbon bike or a road bike with the specific intention of touring until they are comfortable with a lightweight gear load on a more regular touring/sport touring bike and have addressed how they will carry their gear on the bike. Also the type of touring has to be considered. A carbon frame with 25mm tires and fairly high gearing is only going to work on good roads, no bush wacking or trail riding.