Join Date: Apr 2010
Location: Near Boston, Massachusetts
Here's my take. I'm a beginner and I mostly work in cheap woods (pine, and a little maple and red oak for boxes), so take this for what it's worth.
DMT is in the business of selling you things. They're also in the business of getting you sharp tools, but that's secondary, which is as it should be. I have a set of their plates, red, blue, and green, and those plus a strop can get me a finish that's very near being a mirror. That's sharp enough for me. They'll easily pare shavings off end grain pine, which is my usual test. I think the ones you have actually go finer than the ones I have: I'd stick with those, and maybe consider a scrap of leather and some stropping compound as a final step.
Some experts will agree with this. Others will say "No, you have to go to 12,000 grit if you want a good edge!" I aim for simple, and I'm pretty happy with what I have. I'm not sure I have the right answer, but then, I'm pretty sure there ISN'T a right answer.