Silver is an interesting idea, a few bullion analysts I've read reckon silver could easily give huge returns. The trouble with silver - it takes up a lot of space. You can hold over $2000 worth of gold in a clenched fist so nobody would know you even had coins there. $2000 worth of silver is five rolls of eagles.
The other thing with silver is the premiums over spot are much higher. A gold coin might trade at 5% over spot, maybe 10%. A silver coin trading less than about 20% over spot would seem cheap.