It seems from year to year, the standard panel sizes changes. Where 42" was a common size a couple of years ago, it's not so much now. 39/40" and 46/47" are the more common sizes. But there still are a few good 42" sets around.
One you might want to check out is the LG 42LS5700. It's a 42" 120hz LED set. LG also has the LM series which I believe are the 3D versions. And then depending on options, there's the 4500, 4600.
I think you'll find you can get the 46/47 sized sets for about the same price as the 42. I remember looking for a smaller 26" set some time ago for a kitchen area and they were priced the same as a 32" set.