With Boeing Co. (NYSE: BA) having now showcased its new 787 Dreamliner, investors might wonder if it is too late to invest. According to three newsletter advisors, there are still upside opportunities. One looks at Boeing itself, one spots value in an aircraft seat and interior designer, and one looks at an aircraft leasing play.

Boeing is a buy for longer-term investors from Bernie Schaeffer, who recommends the shares in his Power Stocks advisory.

Technically, the advisor notes that Boeing recently broke out after a lengthy sideways consolidation. From mid-November 2006 to the middle of last month, he points out that the stock traded in a narrow range between $85 and $92. He explains, "Such long periods of sideways movement can be followed by extended trends."

That level, he now says, should hold as support and should serve as a "foundation for higher prices." Further, he adds, the stock's rise above $100 is "psychologically significant" and should offer additional support for the stock.

The contrarian advisor notes, "Even with the strong fundamental and technical backdrop, Wall Street remains fairly pessimistic. According to Zacks, nine of the 18 analysts rate the stock a 'hold' or worse and three of those have a 'strong sell' rating on it. Any upgrades or upward price target revisions from this skeptical crowd could boost the stock."

Meanwhile, he maintains a target price for the stock is $127 a share. In addition to investing in Boeing itself, there are two ancillary companies that couldl benefit from the success of the Dreamliner.

Last December, over 100 stocks were featured in our Top Picks for 2007 report. Now, at mid-year, we turn to the 20 advisors whose picks showed the strongest gains to get an update on their previous picks, as well as a new favorite stock for the second half of the year.

Vahan Janjigian, editor of The Forbes Growth Investor, chose Sirenza Microdevices (NASDAQ: SMDI) as his top pick. Although the stock rose 35% as of June 1, 2007, the issue no longer meets the requirements of his quantitative model and has thus been dropped from his coverage.

His new top stock pick for the rest of 2007 is AT&T (NYSE: T). The advisor explains, "As measured by revenue, AT&T is the world's largest telecommunications company. It provides both wireline and wireless phone and data communications services.

"The company realized cost savings of $300 million in Q1 from the BellSouth acquisition. The November 2005 acquisition of SBC Communications yielded an additional $600 million in savings in Q1.

"Better-than-expected synergies have led management to increase the 2007 operating profit margin target to 23-24%. The Wireless segment added 1.2 million net new subscribers in Q1, bringing the total to 62.2 million. Average monthly revenue per user increased 1.4% year-over- year to $49.21 per month.

"Total churn improved to 1.7%, down from 1.9% in the prior year period and 1.8% in Q4. Churn for postpaid customers hit a record low of 1.3%. These improvements helped the Wireless segment expand its operating profit margin to 38.9%.