Owner of Series 80 Gold Cup, here, ca. 1985 manufacture. Front sight fragile. Eliason rear sight fragile. Collet bushing fragile. Trigger mushy, compared to any half decent trigger today. Accuracy is ok, but my Para Ordnance P14.45 was more accurate out-of-the-box.
Pre-Series 80 had a great reputation, but there was limited competition from factory guns in those days. If you wanted more, it was custom, usually based on a base Colt 1911. Today, there are so many choices, so unless a Gold Cup is the only 1911 available in your locale, keep looking.