That is a pretty good stack. Most stackers would have a great collection with just that.

You asked which was worth more, the 160 ounces of silver, or the 4 gold Sovereigns. It's the 160 ounces of silver. Each gold sovereign has a little less than 1/4 ounce of gold, and it takes around 80 ounces of silver to get one ounce of gold on the market, so the silver is worth around twice as much.

They're still lovely though, and I wouldn't mind having a few in my collection. Congrats!