Frankly I see no need to recategorise downloads based on the Uploader's credentials. If it's for Poser, put it in the Poser Category. Nobody needs a judgement of quality on the download to see if they want it. The thumbnail images should show whether or not the item is suitable.
If you're talking Pro content versus Amatuer, you're talking Store Front VS Freebie. This doesn't mean there can't be a two tiered payout system. I just don't think it needs to be categorised and separated. If you want Pro status, go sell items via a storefront or talk Jake and David into adding a storefront here for professional items. Please don't muddy up the categories now that they've just gotten sorted out recently.
Me, I don't make a habit of going through the download areas here searching for stuff. I only download Items I've seen announced on sites like Renderosity or DAZ if the item suits my needs and then I usually just download directly from those sites via the links given.
It is a miracle that curiosity survives formal education. - Albert Einstein