Updated from 9:15 a.m. ESTGoogle ( GOOG) was benefiting from positive Wall Street commentary Thursday, with analysts saying the Internet search giant remains a buy. Goldman Sachs has a price target of $595 on Google's stock and lifted its profit estimate for the current quarter to $2.90 a share. Goldman reiterated a buy rating. Anthony Noto, the analyst at Goldman, also said Google should earn $17.47 a share in 2008. Meanwhile, Banc of America affirmed buy ratings on both Google and Yahoo! ( YHOO), saying they could have revenue that's above estimates in the second half of the year. Shares of Google were higher by $8.44, or 1.7%, at $497.90. Yahoo added 57 cents, or 2%, to $29.27.