At this point I'm already rather leaning towards those Dunlop K70s in time for next year's state inspection, since I plan to do lots of rural touring and camping on the Enfield...sort of a very occasional mixed surfaces thing, though perhaps not with enough muck and gravel overall to warrant those knobbier-looking dual-use Shinko 705s also mentioned here, which, though seemingly nice enough and well-regarded, just look a little too "21st Century" for my retro tastes and bike.
My first bike, an ex-police Norton Interpol 750 Commando had Dunlop TT100s (which I gather was the predecessor of their current-day K81s), and I just sort of stuck with that type as I wore them out, even on my subsequent Norton "Desert Sled" 750 N15CS (with the exception of an ultra-cheapo mail-order Taiwanese front one for a time dictated by my budget--or rather woeful lack thereof back then). The "Sled" saw a lot of gentle non-road use out there in and around Austin, Texas, and always seemed pretty happy moving off-grid with the Dunlops.
Amongst the Norton folks, at least in Britain in the late '70s and early '80s, one was either a Dunlop or an Avon devotee. One was led to understand in the darkest terms that one must never mix the two brands for fear of demonic intercession in the bike's handling, particularly in the wet, which, as we know, is rather a defining characteristic of motorcycling on that Sceptered Isle. Furthermore, while Dunlops had a reputation for being harder-wearing and longer-lasting and hence belovéd of the poor or miserly, Avons had a sportier "stickier" reputation as being more suitable for your velocity-prone footpeg-draggers, still-surviving ton-up boys and other reckless live-for-today spendthrift thrillseekers. Thing is, since one was ever replacing just one's worn-to-the-cords rear, while the front was nearly always still perfectly serviceable, once committed to one or the other brand one was pretty much stuck with it.
Accordingly, I was actually pretty happy to find my new-to-me Enfield already wearing Avons: finally a chance to give that storied brand a try at long last. I figure I've got maybe a year's semi-decent tread left on them before I really need to decide. I imagine it's also possible that by then that rounded and roadsporty Avon rear will have gouged out a lovely sort of luge track trench arcing right through my front lawn and around the side to the back yard, so I'll just be able trowel on a little cement, tuck in my chin, and make to and from that shed at speed like Bruce Wayne in the Winter Olympics.