Which 42-46" tv for kids room

[obob]

I need a new TV in the room where the kids watch TV as well as me occasionally. Needs to be at least 42" as it's a big room but would prefer 46", there's Sky HD in that room and probably will get a Blu-Ray player.

The cheaper the better but don't want to have to replace in the next 5 years so must be decent.

So, the options I have seen:

Samsung PS43D450 for £354.99
http://www.amazon.co.uk/Samsung-PS43D450-plasma-wi...

LG 47LV355u at £499
http://www.richersounds.com/product/tv---all/lg/47...

Panasonic TXP42ST31B 3D for £499 with 2 free pair of glasses
http://www.currys.co.uk/gbuk/panasonic-viera-tx-p4...

Now is the 43" Samsung any good as that's a lot cheaper than the other 2 and is 3d worth it? Or will the LG have a better screen if I choose to spend £500?

One thing I need is to be able to view it from various angles without the picture disappearing!!

Thanks