There were like 50,000 made over a decade and they come in two basic flavors of similar intensity,
one is the slow hard roll your own, the other is trade your hard slow employment into a ready to roll Commando.
Two ways to go on the roll your own, buy someone elses crappy rust bucket to tear down and toss out a good lot of it for new, or just buy the good stuff ready to go or mostly so and build up from scratch w/o the hassle and waste of the 1st way.
Two ways to go on the ready ride kind, one offs by private builders of all levels of accomplishment or professional shop offerings in US or UK.
Two paths to take in each of the above too, one essentially factory by the good book, the other about anything nonNorton goes.
Two styles apply to each of the above, sexy racy sleek uncomfortable minimalist to laid back heavy luggage cruiser.
The cream of the crop handling and performance to me and many is the '72 Combat 750 Bomb, that had so many problems its essentially what opened the fatal wounds that bled Norton to death. More Combats sold than any other yr and 1st with disc brake and 6 gallon tank but w/o clunky after thought signals to get knocked off or just quit so easy and often. But all are like keeping a sail boat or wood piano in good tune, always something to tweak just a bit more then something else just in case, for never ending process once infected yet no one looking for the cure, just another fix. They all sound so much bigger than they are and pull way more than expected for its old fashioned engine cc's.
At slow rolling speeds they feel like a cable and wood biplane on a grass field, then a bit faster it lifts off for flying carpet sensation.