First of all, I gave you info on where I bought my paper wheels. To the best of my knowledge, these are the best wheels you can get.
I've done a lot of surveying. I reckon over the years, the surveying has included the opinions of a whole big bunch of people. I didn't count them. Sorry if that offended you.
The most prominent advantage of belt machines is their versatility. It is MHO that it is very time consuming and difficult to either fix a damaged blade or reprofile a blade on wheels, and everyone who uses a belt machine does have better results with that. On a belt machine it's only a matter of changing belts and very little time- like you can often times take out small chips and reprofile in a single pass of both sides of the blade.
Belt machines are cheaper than grinders and wheels. I frequently hear that HF machines go on sale for $30. I don't shop there, but a lot of people I listen to do.
Lastly, I did qualify my statements as "My Humble Opinion". I think I have a right to say that. If that doesn't fit into your thread, I apologize. You said you are always interested in hearing about different sharpening methods. I guess that wasn't true.
ps- Thank You for the link, Cbw.