I am toying with idea of picking up a closeout 2011 Trek 2.1. I see that it comes in a H2 and H3 version, the H3 being more comfort oriented. I don't really get the geometry charts with all those measurements. I wondered if anyone else had compared the two and felt a significant difference between the two? I am looking for a little more upright ride due to some back issues. Could I achieve the same results by swapping stems or adjusting handlebars, etc. on a H2ead of searching for a h3 frame?