annie - if you want more detailed info on this, let me know. i sell electronics, after all.
whether or not 26" is big enough is all relative. i have a 50" in my fairly large living room, and it's the perfect size for where i live, so for me, i'd go crazy watching a 26". for a smaller room, something in the lower 30s is probably best. i'd opt for a 32" personally, because when you hop up to that size, you hop up to the tvs that manufacturers are putting more technology and better components in to. they're made to be the main tv in a house, whereas smaller tvs are usually secondary in a house and therefore not as high on a manufacturer's list as far as things to make well. more time and better parts are put in to the larger tvs, kwim? you also will usually get more HDMI inputs, a faster video processor, and probably a better resolution.
if you want, PM me a link to the tv that you're thinking about getting and i'll see if it's a good deal/a good tv.