Good advice,
JPM hasn't accumulated the biggest physical silver stack in history by accident. The GSR (gold silver ratio) is currently at around 80 and it should be 14 oz of silver per 1 oz of gold
Though I would question buying 1000 1oz coins. for cost sake. Yes they are more liquid but maybe spread it out but
You would be looking (in AUD) at say $31,000 for 1000x 1oz coins
Where as you could buy 1000 oz in 10 oz bars for $28.5k
They are still very liquid and sell quickly on the markets.
Even better would be 1kg bars ( 32.1 oz) for 28k. Normally this is a bigger gap between 10's and KG's just some really cheap 10oz's on the page I linked currently,
Just stay away from high relief 'premium coins' even those from Perth Mint, the milkspots is now effecting pretty much every mint in the world, so dont pay extra for a coin that has a high chance of developing milk spots and losing it premium status. Plus then storage isn't an issue

http://www.goldstackers.com.au/store/silver.html