My only concern with wall mounting is, is the TV going to go too high for viewing? It seems to be fashionable to wall mount over a fireplace these days, but in my opinion, your TV is too high then and you'll be craning your neck to watch it. It might look good, but if you have to keep going to an osteopath instead of watching it, it doesn't sound great to me!
A pedestal on a proper AV stand tends to put the TV at an optimal viewing position (from a sofa anyway!), but then if you wall mount sensibly, then this won't be a problem!