Hi Waka,
I'm with Chris - my first choice would be oak, will last forever.............
............unless white van man comes along. He came to my house a few days ago, not delivering to me, just lost. I heard the crash as he wrecked one of my (very old) oak front gates, and the post, trying to reverse into my driveway.

The gates were open but he missed the driveway by about 3 feet! :roll:
Briefly, but only briefly, thought about making a new pair. Then quick call to insurance company - "No problem. We will deal with that for you against the third party. Our repair company will contact you within 48 hours." And they did. Replacement pair of gates to be hand made in oak, to match existing pattern, and installed - estimated cost in excess of £3,000. :shock: :shock:
Cheers,
Trev.