Just fought this battle...ended up going with this one:
Should fit the 50" I just bought nicely. No reviews though, take that for what it's worth, looks nice to me...
$81 + tax...I had some SYWR (or whatever the hell they're called...) too, so that brought it done even more.
Used coupon code KMART10PSAVINGS for 10% off. Code also gives free shipping, but it should be free anyway.
Could probably use OFFERS10 as well (I'm assuming they don't stack, didn't try!); which gives 10% off if the above doesn't work.