Note* Might have and upgraded deal on the
A2 TERMINATOR.
I have come to have 3x
Noctua 120mm NF-F12-PWM http://www.webhallen.com/se-sv/datorkomponenter/144910-noctua_chassiflakt_120mm_nf-f12-pwm Fans that i could replace the Stock-fans with making the machine almost dead silent. But will be holding on to them unless someone is keen on the ide' that i could replace the stock-fans before selling the unit (would bump up price with the fan value then). It is very silent compared to the SP30 overall and could stand in your house or even an office without making much loud noises without upgrade. But with
them you could probably be sleeping with it under your bed

.
I dont believe that this Noctua fans are ok for A2T. Their CFM and static pressure is much less than in original fans.
It would be good to compare temperatures inside.