Look over where the case fans are already located inside the case itself. If you have 80mm fans often you can get a pair of 120mm adapters to accomidate the 120s you want in. Most vendors will have those onhand anyway for a few bucks. I can understand the not wanting the far out look on your desktop atx case. Remember that many of those are the people that like to more or less live in the extreme or simply showboat hardware. A few of us just prefer to add a slight difference at times to avoid falling asleep.