So let us have some pix!
About high and low handlebars: remember that the height of the handlebars is not the only thing that affects howupright you sit. Bars like Northroad and similar (flipped or not) brings your hands closer to your body than a flat bar or dropbars set at the same height would do since you would be more stretched out.
A sprung saddle is good for more than just your comfort, especially if you are heavy/ or has got plenty luggage. It helps (together with fat tires) to reduce the harsh beatings both your wheels and your frame recives from riding in bumps.