I have an 32 inch Samsung and it makes a HUGE difference to my gaming experience. I used an 21 inch CRT TV for years but it started to have too many problems so I had to get a new one...
Yes, I have a 32'' Dynex. It supports up to 1080p, and I have the Enhancement cable for the Wii as well. It does increase the quality, but only up to 480p, or ED (Enhanced Definition), which is what the Wii is, an ED console.