A highly accurate and reliable 1911 like a Glock? How about buying a Glock? But then a Glock is like a plug-and-play appliance and not something exotic to pass on as an heirloom.
A tuned Wilson Combat, Nighthawk Custom, Les Baer, Ed Brown, or an STI, for slightly less, would be highly accurate.
But a highly accurate boutique 1911 isn't always the most reliable. Like a fine exotic car it has tight tolerances (hand fitted, tight slide to frame, no rattling) and does not like going 2000 rounds without a cleaning.
If it's an heirloom to pass on then I would stick with a traditional name like Colt or even Springfield in a basic G.I. model. Classics will never go out of style.