Agilent ( A) upgraded at JP Morgan from Neutral to Overweight. Stock also added to the Focus List, using a $46 price target. Company also remains a potential takeover target. Broadcom ( BRCM) upgraded at Citigroup from Hold to Buy. $52 price target. Networking and broadband should drive a return of revenue and margin growth over the next couple of years. Eaton ( ETN) upgraded at Friedman, Billings Ramsey to Outperform. $104 price target. Estimates cut to reflect lower near-term earnings, but growth remains solid in several areas. Stock also trades at a discount to its peers. General Motors ( GM) downgraded at Bear Stearns from Peer Perform to Underperform. Estimates look high, following the UAW settlement. Company also highly levered to a slowing US economy. Manor Care ( HCR) downgraded at Friedman, Billings Ramsey to Market Perform. Stock is trading near the $67 price target, reflecting the bid from Carlyle Group. Knight Transportation ( KNX) downgraded at BB&T from Buy to Hold. Weak freight volumes are not likely to improve in a lackluster economic environment. Navigators Group ( NAVG) downgraded at FBR from Outperform to Market Perform. Valuation call, as the stock is up 21% since the beginning of the year. Fundamentals remain strong. $62 price target. RSC Holdings ( RRR) initiated by UBS. Initiated with a Neutral rating. Introduces $18 price target. Introduces 2007 EPS estimates of $1.38 and 2008 EPS estimates of $1.60.