BB30.... I've had it on a caad10 and it was no problem at all until I got my LBS to refresh the bearings, then it was creak creak creak.... so I bought the tools from ebay (search burton bb30 tools) and followed their video and did the job myself and really took my time, and hey presto, no more creaking!!
I also had a caad 12, i got it frame only, fitted the bearings myself using my tools from above and again, took my time, and again no issue.
as for discs... only in really bad rain do they make a noise, in my experience at least, I would never go back to rim brakes now
BB30.... I've had it on a caad10 and it was no problem at all until I got my LBS to refresh the bearings, then it was creak creak creak.... so I bought the tools from ebay (search burton bb30 tools) and followed their video and did the job myself and really took my time, and hey presto, no more creaking!!
I also had a caad 12, i got it frame only, fitted the bearings myself using my tools from above and again, took my time, and again no issue.
as for discs... only in really bad rain do they make a noise, in my experience at least, I would never go back to rim brakes now