Don't think you can lose with any silver play ... even SLV in the short term although that is least trusted.
SLW, FR, CDM will all be solid money makers. I also have a royal bank held silver etf. CEF.A hold 45% silver, 45% gold and 10% cash ... also wouldn't hurt to but at least 10 kilos of silver ... from time to time FR who sells it has a small (usually enough to cover delivery) discount where you can buy up to 600 ozs if you are on their e-mail list.
Good luck
orgy