If it is a 32" BV3, go for that. Better sound and basically an Avant. Make sure it has the surround module. If you are watching movies, you want a widescreen. The picture is as good as the flat screens - better than most of them! It also looks like a flat screen from the front!
If a 28" BV3, get the MX! Same chassis but much bigger screen on the MX. The 28" BV3 was a loss leader used to get people into the shop - unless it has been optioned up, it can be quite basic and the sound is just not as good.