Mary Anne and Pamela Aden are among the advisory world's top authorities on metals and resources.

In a recent Q&A session, the editors of The Aden Forecast answer the most common questions that they are asked by readers as to the current state and future outlook for the precious metals markets.

In addition, the sisters answer what they say is the most frequent question they receive: "What is the best way to buy gold." Here, they offer a review of five strategies for investing in gold, including their top picks among stocks, closed-end funds and ETFs.

Each year Steven Halpern, editor of TheStockAdvisors.com, surveys the leading financial newsletter advisors asking for their favorite stocks for the coming year. This article is part of his 24th annual Top Picks Report.

Resources expert Mary Anne Aden, turns to silver for both her favorites for 2007 -- selecting the exchange-traded fund iShares Silver Trust (ASE: SLV) as her conservative investment and Silver Standard Resources (NASDAQ: SSRI) as her top speculation.

In The Aden Forecast she explains, "In recent years, commodities have been rising strongly and this boom is expected to continue in the years ahead. Why? China and other emerging nations have been buying on a grand scale, and it's not only commodities.

"As these countries build and grow, demand has increased sharply for oil, other raw materials, and metals. The strongest commodity has been silver. It's consistently outperformed nearly every other investment, and with reason. More silver is being used than is being produced and it's headed for a world shortage.

"That makes silver a top pick for 2007, and an easy way to profit is to buy the silver ETF, iShares Silver Trust. The best silver share is Silver Standard Resources. Although higher risk than an ETF, this stock is a good way to benefit from silver's potential, and is my top speculative pick for the coming year."