Actually that is a pretty nice looking setup and the heavier duty wheels and tires will increase your capacity significantly. I would be cautious with too much weight in a handlebar bag - no tools! - the location can have a significant adverse effect on handling - better to use it only for your snacks, camera, wallet, etc. Put the tools in the bottom of your panniers. From personal experience I would also suggest trying to get the weight on your rear rack (panniers plus gear) down to 40lbs. Over the long haul it will give you more stability, more speed and better reliability.