It's not any louder than a corsair case, or a few other solutions I have. It only becomes loud if it gets really hot inside the case. Since you have liquid cooling (good choice btw), it should not be louder than any other solution under regular use. You can also adjust the fan speeds/curves with the supplied Alienware control center, or you can select from several pre configured thermal profiles.
I ordered an R10 the other day and after doing some more research on it, is it really that loud? I've apparently ordered the version with liquid cooling so I don't know if that makes much of a diff?
Aurora R10, about the noise issue?