Daytonas or
Altbergs seem to be the names that came up most when I asked about this a while ago.
Jim, who works with us at 'Loco, has got a set of
Hoggs that are 19 years old now, and still look good as new. He's an advanced riding, track-day instructor and TT marshall, so it's not as if they're not being used either.
Kinda tempted with a pair myself based on that kinda recommendation.
I've got a pair of Daytona's that I picked up half-price at the bike show about, oh heck 3 years ago and they're still in brilliant nick. Hellishly expensive if you're paying full whack for them mind, but I can't complain about the build quality at all.