It depends what you want it for! If standard definition from analogue and freeview is important to you then I would go for the TX-32LXD700. Also the LXD700 is the best if you want good in built sound, it is somewhere between a standard tv sound setup and a surround sound system.
However, if you primarily watch hi def content, especially hd movies then the TH32PX70 could be the best choice for you.
Regards.