How good S-Video looks is HIGHLY dependent on the quality of the TV. I've seen the quality range from "no better than composite" to "indistinguishable from RGB at normal viewing distances", depending on the set. The Sony WEGA sets, which do use Trinitron tubes (though this has nothing to do with S-Video quality), tend to be pretty good.
Note that the S-Video output from a PC is generally inferior in MANY ways to its RGB output, so don't use that as your basis for comparing the two.
Analog YPbPr component video has an identical quality capability to analog RGB (which, one should note, is also a "component" video format). In practice, it tends to be less "vibrant" and can look "washed out" (I hate those terms as they're totally subjective, but most people seem to get what they imply) compared to RGB on most TVs that support both.
With proper calibration and similar adjustment (which, note, may not be easy), you should be able to get a VERY good picture out of a TV as high end as this sounds using the YPbPr component output. The "HDTV output" found on many ATi and nVidia cards from the mid-2000s are pretty good and should permit you to have full control over the video timing so you can avoid ugly scaling. In general, it should look better than any LCD, since it doesn't need to be scaled.
Also, SOME (not many, but a few) TVs can accept RGB on their "component" inputs. You'll need a suitable breakout cable (like $5 on monoprice) and a video card that can do sync-on-green. If the TV supports it, there should be an option in the menu somewhere to change the "input colorspace" from YPbPr to RGB.