In my humble opinion, if you are planning on putting it away for the long term ---- $10k GOLD all the way.
Caveat - I'm uber bullish on GOLD being a winner but SILVER has the potential to out perform. Emphasis on potential. Both are going to do just fine
EDIT TO ADD
If you buy GOLD go for 1oz Perth Mint coins (assumption you are in Oz). GST Free, 1oz low premium
If you buy Silver go for Bars
Caveat - I'm uber bullish on GOLD being a winner but SILVER has the potential to out perform. Emphasis on potential. Both are going to do just fine
EDIT TO ADD
If you buy GOLD go for 1oz Perth Mint coins (assumption you are in Oz). GST Free, 1oz low premium
If you buy Silver go for Bars