From what I've read and understand, decrescendo, the LG does have a panel lottery. Check out the "LG LE5300 How Can You Tell It's an IPS Panel?" thread on how to determine the type of panel before purchasing. However, I don't believe that Panasonic partakes in the panel lottery. I'm pretty sure they are guaranteed IPS panels. (However, what brand of panel may be different. I haven't seen any info on this.)
These are the top two contenders for me. Anyone have any info on the input lag for the IPS version of the LE5300 and the Panasonic?
And TerrenceQ, the LE5300 is not back-lit that site is incorrect; it is Edge-lit just like the Panasonic.