Bumping up the thread with a question...

So I was riding home last night and about 4 miles from home bailed and took the subway--I was pooped! I was feeling both annoyed by carrying things on my back (can't wait for that rack to arrive!) and tired by leaning over so far to reach the handlebars. If I wanted to achieve a more upright position, should I consider getting the taller riser (12"/300mm) or shorter stem (60mm, 5 deg) or both? I'm 5'8" (173cm) tall with a sleeve length of about 32" (81cm).

Thanks for your input.