I'm in the process of planning a new water cooled system and have started looking the the current state of fans. The current idea includes a PA 120.3 (with a shroud) and at least 2 other 120mm intakes or outlets in the case. Looking around, the AcoustiFans seem good performance/noise wise with the slight draw back that the're rather expensive, i.e. 5 fans would be approaching £100. They do come with speed control cables, but would it be better to have less expensive fans connected to some form of fan controller? Papst and Panaflo (or whatever they are called now) seem to be the other main contenders, though Nexus don't seem to be too bad either. Are there any fans people would recommend for use with a rad as opposed to case fans? I would definitely prefer low noise over performance, the main reason I'm going for a 120.3 is to be able to run relatively low speed fans and still achieve decent cooling.