You're right, those plugs are done. If you are riding fairly gently, no long stretches at high speeds, no extreme temperatures, no heavy loads, then the color on those plugs doesn't look that bad at all. It's important to remember that as they wear (and those are worn), then the quality of the spark and the quality of the ignition sequence as it relates to the function of the plug changes a little bit, too.
Yes, plug condition tells much about engine health, I'd say yours is pretty good, although I might change plugs a little more often. It's helpful to know how you're riding, if this is gentle riding around town, the ignition timing, fuel/air mixture, and engine condition appear to be normal. If this was removed immediately after a few miles at highway speeds, I'd say change your air filter, too, and check it again.
Go with any plug that interests you and check it after a few hundred miles, see how it looks.
Most importantly, pay attention to how you gap the plug. It's best to use the special tool for setting the gap, it bends the ground electrode without touching the center electrode. Don't attempt to set the gap by inserting anything between the center electrode and the ground electrode and prying, you can do a lot of damage to the plug and possibly your engine.