Thanks for this info. This is good to find out now and I like to hear it from people who have had the experience. The dentist also recommended the gold over porcelain. Porcelain, apparently, does not last as long and have many other small problems compared to the gold. I was told by the dentist that gold crowns are more superior in its strength, give and fitting capabilities or something. It just doesn't look so special, to me. However, I’ll go with gold, now.
Is your dentist replacing the crowns? Or is he removing the whole tooth? If its just the crown, they'll cut it in half (not exactly down the middle) and then try to pry it free from the tooth underneath. That's how I'd approach it. Another option is to try to pop the crown free by getting an edge underneath the gum area and see if it pops off that way.