Mecianne, "buffered-pH neutral" is pretty-much the entry level matboard these days. The buffering is not permanent and the boards eventually become acidic and discolored and may damage the art.
The alpha cellulose boards, which include, among others, AlphaMats, rag mats, Crescent Select, Artique and Crescent Rag have had any impurities permanently removed. They will not revert later on.
Many framers have chosen to carry these boards exclusively but you should, as a minimum, use them for matting items with real or potential monetary or sentimental value.
If the item has no monetary or sentimental value, why in the world would anyone go to the expense of framing it? I suppose there is a need for short-term, decorative framing on occasion, but I rarely have a customer tell me, "I need this to look good for a few years and then I plan to toss it."