"The oil-services sector remains my favorite long-term play in the energy industry," says sector specialist Elliott Gue. In The Energy Strategist, the advisor looks to industry-leader Schlumberger (NYSE: SLB).

Gue explains, "Oil services firms will benefit directly from the increasing technical complexity of oilfield development. International business is the primary driver for Schlumberger, which generated only 22% of its revenues from North America in 2008.

"The important question is, where do we sit in the cycle for international operations? In my view, the second half of 2010 will mark the beginning of a new uptrend.

"Over the next five years the energy patch should offer some of the best investments around, and one standout is Schlumberger (NYSE: SLB)," says Stephen Leeb in The Complete Investor.

"Schlumberger, by a wide margin, is the best and most dominant. Its services range from well testing to pressure pumping to seismic testing, and it's No. 1 in virtually every area it occupies.

"Some of its operations, especially those that maintain the health of existing wells, are highly recession-resistant.

This post is part of a series in which TheStockAdvisors.com asked financial experts to name their top stock pick if McCain or if Obama wins the election.

"Go nuclear if McCain wins," says mutual fund and ETF expert Doug Fabian. Here, in his Successful Investing newsletter, the advisor looks at the Market Vectors Nuclear Energy (NYSE: NLR), an exchange-traded fund that focuses on the sector.

"What is likely to happen if McCain wins the White House? Well, based on what he has said so far in the campaign, I think we can make the following assumptions about the sectors most likely to thrive.

"When it comes to energy, we already have seen that McCain is a big fan of oil drilling. It is thus not a stretch to think that oil services and oil drilling firms are likely to thrive if the Republican takes power.

"McCain's other energy focus is nuclear, and that's good news for companies doing the yeomen work in the space. Once again, when it comes to getting invested in the best companies in a specific market sector, ETFs continue to be our best friends.

"The Market Vectors Nuclear Energy ETF is a fund designed to give investors exposure to the best companies in the nuclear energy sector.

"Prices for energy stocks, including the drillers, are bombed-out and should be aggressively accumulated now," says resource expert Eric Roseman.

Here, the editor of The Commodity Trend Alert explains, "The absolute worst thing we can do is sell now." Here's his outlook on energy and drilling and a trio of buys.

"The pain felt by commodity bulls should abate shortly; this mind-blowing expansion of credit will ultimately fuel inflation to much higher levels. Eventually, long-term interest rates will rise sharply in the United States as the government grows hungrier to finance its out-of-control spending habits.

"What we're seeing now is a market that has gone from being obsessed with inflation just two months ago to one now worried about rapid deflation or an environment of declining prices. Combined with bad economic news overseas, the U.S. dollar has seen a violent reversal exacerbating the plunge in raw materials. It's been a brutal sell-off and the worst decline I've seen since mid-2006.

"Atwood Oceanics Inc. (NYSE: ATW) is our bet on the exploding demand for offshore oil drilling rigs," says international investment expert Nick Vardy.

The editor of Global Bull Market Alert explains, "Although it's had a big run recently, the stock is as technically oversold as it was when global markets bottomed in mid-March." Here, he outlines why he believe the stock will perform strongly in the coming months.

"Atwood Oceanics Inc. engages in the offshore drilling of oil and gas wells worldwide. It operates eight offshore mobile drilling units located in six regions of the world, including offshore Southeast Asia, Africa, India, Australia, the Black Sea, and the Gulf of Mexico.

"Atwood is a leveraged play on the price of oil. Oil prices have now blown past the original estimates of major investment banks. Commodities guru Jim Rogers recently predicted that oil will soon hit $200.

"Amid record high oil prices and dwindling supplies on land, the Shells, Exxons and BPs of the world are having to venture into ever harsher and more remote environments offshore to replenish their oil reserves. That puts offshore oil drillers like Atwood Oceanics in the catbird seat.