When I bought my GL1500 used it had Dunlop E2s on it. I've used E3s and my last replacement on the front is an E4. My last rear tire lasted 30,000 miles. I see no reason to change. True these tires whine when you lean the bike but so do millenials when they have an outdated iPhone. The whine never bothered me and I'm content to stay with the Dunlop elites.
hi mate for what its worth dont know if you can get them over there but im using bridgestone exedra on mine i had metzlers on but only got 2500 miles from them and they feathered off giving me a big wobble when i changed my tyres i couldnt balance them so i removed tyres and checked balance of the rim it was way out heavy about a third of way from the valve arond 50grames so put white dot there marked rim for future ref and now i can even let go of bars no wobbles front tyre pressure 36 psi rear 42 psi
I can confirm the wobble on my GL1500 with a Metzeler in front and a Dunlop rear. Didn't had this issues with Dunlop F and R.
Now I put Avon on it, and it's a great ride - with the some miles I did so far this year.