This is what I have always used on my wing. I get them from wingstuff.com which I always find to be the least expensive.
BRIDGESTONE TIRE COMBO FOR GL1800 G704/G709
By Bridgestone SKU: WSBRCOMBO
$459.99
I have the Bridgestone on the front of my new Wing.
I like it much better than the Dunlop that it came from the factory with.
I went with the Shinko 890 Journey on the rear.
I hated these on the Valk but it was the only reasonably priced tire that I could get in a hurry for the Wing.
So far I don't have any complaints about it on the Wing.
I'm not expecting to get much life out of it just because I didn't get much out of one on a Valk.
It could surprise me but it was bought to fill a short term immediate need so it's no big deal if I don't get a lot of miles out of it.
The Dunlop that it came from the factory with only lasted 7k miles, the Shinko can't do much worse than that.