Late model Sony crts from the early 2000s are your best bet. I would stay away from any sony crt that has a built-in digital tuner since they lack many features and inputs that those without the digital tuners have. I agree with FXmercenary that the curved tube tvs are great, but it is much more difficult to find a quality one nowadays. I will list some of the more important things to look for and those to stay away from.

1. Convergence: Check the screen for any color separation, particularly around the edges. Convergence issues are very difficult to fix and usually require opening the back of the tv. Poor convergence is usually due to changes in the posistion of the CRT yoke (the mechanism that puts the image on the screen) from wedges that tend fall out over time. This is not that big of a problem for Sony tvs 32 inch and up since they have convergence controls in the service menu.

2. Darker screens are better than lighter screens: You need to look at the screen while the tv is off. The darker the screen the deeper the black level of the tv will be. Lighter screens make the darkest blacks look grey. If you take a look at several crts in a pawn shop, you'll know what I mean. This is often overlooked.

3. Inputs: Good crts will have at least two composite inputs, one S-video input, and an analog audio out. Some later model sonys have component video (a major plus).

4. Geometry: This is the most common problem of a crt and no crt has perfect geometry. Try to look for any image bowing or lines that are not straight. Many geometry issues can be corrected in the service menu, but research this thourghly before attempting.

5. Contrast and Brightness: Pay particular attention to the change from dark to bright scenes and look for any blooming or expanding images during this transition. If this occurs, it could be due to a weak power supply or short someone on the board. Stay away from tvs with this problem.

Pay attention to these five points.