If you want a 9ft blank strictly for cobia fishing get a gator T90L. If you would use something shorter I would use a seeker PS85. I am sure some others will chime in with their opinions but those are my two preferences.
i jus saw this and decided to chime in... wat exactly are you looking for in a rod? graphite or glass? fast or slow?small jigs,big jigs, or eels?
if you want a glass rod thats slow get a gator t90l or t90h... the Ps85 is bad ass also but has a faster action
if your looking for graphite rainshadow 1088 and 1089s are nice... i have a 1089 blank im gonna have wrapped. yesterday i was throwing a friends amtack viper 1089 and i absolutly love that rod, great action and can launch a jig... he also had a viper 1088 which was also a nice rod but i liked the 1089 better. Pac bays 1088s and 1089s are another sweet rod. if you can find an allstar those are great rods... i know loomis also makes (or made) so good rods but i dont know any of the blanks.