I own an NZXT h440 and the noise on that is fine with 4 case fans running and two radiator fans running too. I havent used the 450 but i would say that its safe to assume it will perform simmilarly to the h440. I think the 450 looks better and will have simmilar sound performance to the h440 but the h440 still looks good and has good sound. You would be paying extra for looks if you bought the 450 vs h440
hope this helps