i recently bought most of the classic pirates sets and i think BSB is cooler than SES. the IF is also cooler than the CC. yes, it can't match SES in firepower but it just looks cooler. if i only have room for 1 ship to display, i would display the BSB vs the IF.
i don't think the new pirates line will blend in well with the classic pirates. the prototype torso just doesn't match well with the classic. i prefer the classic's nice bright colors. the new line seems to be in dark red. and the lack of chrome gold/silver printing makes the torso seem rather dull when compared to the classic pirates.