Hi,

The X80AJ looks like a cheaper version of the X80J from what I see based on specs - primary difference being the type of motion enchancer
used by both models. The X80AJ has Motionflow XR100 while the X80J has Motionflow XR200 but bear in mind both models are native 50Hz.
Other than that, I do not really see any major difference between the 2 models feature wise.

What sort of prices are you being quoted for these 2 models? The guys here will then be able to provide some recommendation though we have a
separate discussion here which might be useful too :

65" TV recommendation

Cheers,
V.

Link?