Thursday's Analysts' Upgrades and Downgrades

Sirius (SIRI Quote) estimates changed, price target lowered at UBS: SIRI estimates changed, price target lowered at UBS. 2006 EPS estimates lowered to $(0.81) from $(0.80). 2007 EPS estimates raised to $(0.47) from $(0.50). Price target lowered to $4.25 from $4.50. Reiterates Neutral rating.

SRA International (SRX Quote) numbers reduced at Jefferies: SRX numbers reduced at Jefferies. 2007 EPS estimates lowered to $1.07 from $1.18. Reiterates 2008 EPS estimates of $1.18. Lowers price target to $23 from $25 and reiterates Hold rating.

SRA International numbers lowered at UBS: SRX numbers lowered at UBS. 2007 EPS estimates lowered to $1.03 from $1.19. 2008 EPS estimates lowered to $1.22 from $1.40. Price target lowered to $27 from $32. Reiterates Neutral rating.

Sun Micro (SUNW Quote) price target raised at Goldman: Goldman is increasing its target on SUNW to $7.50 from $6.50 based on greater confidence in execution and potential for earnings upside. Analyst meeting on Feb 6 likely to provide further information in improvements. Maintained Neutral rating.

WebEx Communications (WEBX Quote) numbers raised at Jefferies: WEBX numbers raised at Jefferies. 2007 EPS estimates raised to $1.68 from $1.63. 2008 EPS estimates raised to $1.99 from $1.90. Price target raised to $42 from $39. Reiterates Hold rating.

XM Satellite (XMSR Quote) estimates increased, target lowered at UBS: XMSR estimates increased; target price lowered at UBS. 2006 EPS estimates raised to ($2.56) from ($2.65). 2007 EPS estimates raised to ($1.95) from ($1.96). Price target lowered to $15.50 from $17.00. Reiterates Neutral rating.