what brand? samsung?
the 50" is 6-8" deeper than the 46". keep that in mind.
i have been shopping now for about 2 months and wouldnt go over 46" with out stepping up to 1080P.
and i hope you’re not trying to justify the 42" based on price. you will be bitching about it and the black grass in a week just like everyone else on the A/V forums.