A very interesting topic, particularily at this time. This past Friday, my upper back, shoulders and neck were hurting so badly I visited a chiropractor for relief. I go back again on Monday.
At home I have a 21" monitor with a video card that will do such a high resolution that I cannot read it. My chair is comfortable and the chair, monitor, desk height seems to be the correct relationship.
I work as a BOFH at a small company in the bay area of California. My boss is so cheap.... well, we'll just leave it at he is extremely cheap. At work, I have a 19" monitor, and if I'm lucky, I can get 1024x768 out of the video. My chair is a hand-me-down. My desk, chair, monitor relationship sucks. I've tried many many times to get the relationship better, but haven't yet found a comfortable combination. I find myself 'hunkered over' everytime I sit at my desk. Therefore, my upper back and shoulder pain.
Take it from someone who is there right now! Ask to get your work area comfortable, whatever it takes. If you get no reponse, then go to HR and complain about it. If you go to HR, you should get a positive response right away. Don't just sit there and let your posture at your workstation cause you pain ! Believe me, I know, I'm suffering for it at this moment!