hmmm. a more flexible shaft wont promote you to close the face at impact. you will have to learn that on your own to remove the slice aspect of your ball flight. also if you have a slice, a more flexible shaft is more prone to leaving the face open at impact. Just my .2, dont forget about lessons, as the club wont do all the work.
Also about the Cleveland if you like the look of the Cobra's go check out Cleveland's Launcher line. the HiBore doesnt have a traditional look. Also remember with the Launcher, the solid impact zone is slightly above center, so to properly get the most out of the Launcher a higher tee will be helpful.