Aside from being extremely helpful here with his broad range of experience with many different makers, Millions is never the less actually just a mere amateur when it comes to snooty, that's typically my job here, and he really wasn't being snooty or accusing you of it, he was just nudging you to make a decision. Innuendo doesn't always translate well. And it's well known that I always experience great indecision in these matters myself, so there is no reason to take anything personal here.
So just take your time and think about it. Just some considerations to help: It's not that big a deal to go from 500 to 2K with fast cutters like Shaptons. An 8K Shapton behave more like a 6.5K Chosera/Ninawa Pro, and similarly through the whole line, so none of them is as fine as their numbers indicate. But 500, 1K, 4K is possibly going to be the easiest for you to learn on. And people who agonize less over money typically have an easier time finding it. Or so I like to think. ;-)~