I was hoping you'd reply again quest_for_silence as you were so helpful
Just to point out that the TR fan is not bad at all at its lower speeds (SPCR tested it, from 7V and under it's a good performer), I mean it cannot go lower than about 700rpm but it's pleasantly very quiet at that speed: the only concern is whether or not EasyTune 6 (or SpeedFan) can drive it properly (I don't know how much those modern GB BIOSes are effective).
This is over my head, but I believe SpeedFan is Windows software - are you implying I'd need something like this to make the fan as quiet as possible, which may not be possible for me running Mac OS X?
But eventually I don't see any substantial drawback to choose directly the Scythe Mugen 3: according to what I see, it should be around 33-34gbp (just for example, systo.co.uk), while the TR is around 23-24gbp, not a huge difference for a quieter fan (i.e. for a bit of more peace of mind).
Yes, it'd be worth it to me. I'll probably go with that then - but will it fit my case? According to Systo
its dimensions (WxDxH) are 130 x 108 x 158 mm. But if you look at my most with pictures you'll see the ruler's showing 152mm at a point well within my case (ie. where you see the 6 inch mark, before the cable running over the ruler. So I could probably fit something 158mm high in and still get my case cover on top, but it's not obvious...
If this fit isn't wise, are there any obvious smaller candidates for my needs?
However, if every penny is a concern, please take also note that the fanless HR01 should cost you even more, I guess.
£23 + £8 so similar.