You will of course you will get a different answer by each person's experience. From my experience and going to various forums like this about home theaters (especially http://www.hometheaterspot.com ) a calibrated Mitsubishi is the best. I agree you should get a wide screen, even without the program being in HD, after awhile it looks more natural in 16:9 than 4:3. The Mits sets are very tweakable. To have a professional come out and do the job correctly costs quite alot - upwards of $300 or more. But the results are fantastic - really very noticable. They will get it in perfect focus, grey scale and color, set the correct brightness and contrast and set the contols to the center for these settings so you know where the correct setting is. They will also get the convergance as perfect as possible. If the set has a color bias (many have too much red noticable in faces) they will correct it and make everyone look natural.
Some of these things can be done by yourself if you visit some of the sites. They have step by step instructions for some of the calibrations. Also, there is a DVD called AVIA. It takes you through getting the color, contrast, sharpness, etc.. set correctly. This can be done nearly as well as having someone come out.