I came over for this Thread from TOS, I obviously haven't posted much and do not know the forum rules regarding mentioning other forums. But in terms of Silver/Gold options there is a forum I have used (UK) where they do group buys from The European Mint (Estonia) and Gold.silver.be (Belgium). Plenty of Youtube vids regarding these group buys. I believe the next group order begins end of Oct and last for 4 weekends.
I have only been involved with 1 order, but it was far cheaper than buying in the UK, along with a wide choice of UK coins (lunar, queens beast etc) as well as worldwide coins. Worked well for me.
For Gold, Atkinsons and Hatton Garden Metals are normally competitive.
I have most of my silver in Bullion Vault, but do also hold over 100oz of Silver at home along with a few oz of gold.