Best tire brand / style for vintage 1970's CB750 Honda?

I'm replacing a worn vintage Dunlop rear tube tire on my early CB750 Honda. It's a Dunlop Roadmaster K81 4.25/85 x 18 tire with an H rating.
Note: has remaining Donlop Roadmaster 19" tire on FRONT.
Change tire tread style or Brand for rear replacement?

I've had very good results out of Continental tires on mine.

Their excellent in the rain, and they wear good, extremely good.

Dunlop always felt "flat" to me, their hard to maneuver and made you feel like you had to pull on the bike to get it to change lanes instead of just leaning. More like a beginner tire.

Look at the Michelin Anakee 3, I like them.

It will have to be a tube type tyre as the wheels will not handle tubeless. That will determine the range you can choose from. If you can get the roadmaster then that is the one to go for.

http://www.avonmotorsport.com/historic/motorcycle/speedmaster-mkii

You can get Dunlop TT100s too.

I replaced worn Dunlops 4x18 with 4.10x18 Avons with slightly triangular profile for better cornering/ fatter side patch on R69 and BSA thunderbolt. Dunlap now makes a similar profile, Continental has a rounded profile that gives good patch at 30 pounds pressure for light solo rider. I use 35 pounds on back or therabouts- but I'm a 'rider and passenger' load when solo.

Metzler make a modern tyre with a tread pattern reminiscent of the 1970s. I used one on my CB650Z and they look good and handle the corners perfectly.
I sold the bike when I bought my Yam Fazer 1000.