you asked for opinions on these "audio enhancers"
i shared my experiences with them and how i had seen them used in professional/commercial applications
i highlighted just one bullet point because tvtech tried to say that these units were not used in paging systems.... i have read the entire website... more times than you have i would be willing to bet... as well as the owners manual
over the years, i had the opportunity to try aphex as well as other "audio enhancers" in my home system (at no charge)... ultimately a total waste of time....
go out and buy a better amplifier, source, preamp, or speakers.... your sound will improve much more than by using any of these "audio enhancers"
but i can see that you have your mind already made up..... go ahead and spend your money... be sure to invite tvtech over to listen to how your poor recordings suddenly sound so much better
really - why did bother posting the question if you weren't willing to take comments from all possible answers??? who were you trying to convince that buying one of these units was a good idea??
btw - just because a tool is used in the mastering process doesn't mean that it is appropriate to use in the play back signal chain..... i have presented the facts of how and why it is used in the play back chain... which you decided to ignore anyways
but some people won't learn until they lose some money on a "buy it new and then sell it on ebay later" deal