"one of the most innovative Metal records in the eighties" Really? Seriously? How well known was Exxplorer even back then? It's a underground gem for sure but innovative and cornerstone on US metal? Not really.
"[album artist=Exxplorer]Symphonies of Steel[/album]" is a hidden gem indeed; their later albums can't compete with it at all. I haven't heard the latest album though, [album artist=Exxplorer]Vengeance rides an angry Horse[/album].