I know this may be slightly off-topic:
I hooked up an H21-200 to our older 36" 4/3 ratio CRT Panasonic in our master bedroom, I used a good quality S-video cable and component audio. I have the HD channels set for letterbox viewing.
For some reason the HD channels w/ SD duplicates look better than the SD duplicates....... I know it shouldn't make a difference on this TV, but it does.
We hardly notice the letterbox setting for the HD channels. We ended up setting the IRD to not show the SD duplicate channels at all.
Someday we'll get a 38" or 42" flatscreen

, but for now the set-up works great.