i have cx62 midbass drivers. i have not heard the csx tweeters, so i cant comment, but the cx midbass (the 62 is just a 2 ohm version of the 64) has some good sounding output, only problem is that the center of the driver has a phase plug on the top of the pole vent. and if dirt and shit gets in there it can make some nasty sounds. its easy to fix if it does happen (never did for me so its not going to happen unless tons of dirt blows onto the cone).
but the mids sounded great. ID is an awesome company, but honestly for the price, i would get myself a set of mids and tweets seperatly and do an active crossover, its just my way of playing.