I replaced the stock antec fans in the p160 I had, since they were loud. The Vantec fans (120mm) were quieter... Enough to warrant the swap, at least to me. Of course, I only had the p160 for ~3 months before I got rid of it and got a different case. I've since dumped that case in favor of the Lian-Li in my sig... Leaps and bounds better than what Antec produces for cases.