Tim Winton is definitly worth a look into.
I'm a fan of his, and I'm embarassed to say I've never read The Riders, but I can definitely recommend Breath to anybody.
It's written simply but there are some fantastic undercurrents there.
Its the kind of book you're sad to finish, and leaves you sitting there thinking about it after the last page.
Cloudstreet is very Australian, which is great for me as an Aussie, but I harbour no illusions that the rest of the world is particularly interested.
Breath on the other hand, is pretty universal, I think. I can't say enough for this book.
I'll have to check out The Riders.