IMO, it is better to think of the HS as separate from the fan. Aside from a very few units like the Orbs or the Millenium Glaciator, the fan is simply an add-on, NOT an integral part of the HS design.
The noise of the Volcano 9 and any other HS is almost entirely dependent on the fan used. Why would you want to restrict yourself to that? The HS reviews at www.overclockers.com
are the best, most consistent: Volcano 9 is only a middling-to-low performer in their books. That fan is also insanely loud at full tilt. OC says as loud as a Delta 38. It's rated for .2A to.7A, depending on the thermistor or manual control setting. Now, a Panaflo is rated for under 0.1A. Does that make you wonder? In my experience, a high power fan run slow is rarely as quiet as a lower power fan designed for low loise. The motor is just too big.
If you want excellent cooling and low noise, get the BEST cooling "engine" (HS) you can afford & a good quiet fan. The former might set you back a good chunk of cash, but the latter is cheap. Like $2 for that super quiet 80mm Mechatronics. My Swiftech MC462A, now well over a year old, cools a slightly undervolted XP1700 perfectly well with 5~7V from a Panaflo. It's basically inaudible with the case closed. I can't see how the V9 could get anywhere close. The 7+ is another story, though.
BTW, the obsession with low temps is encouraged by many HS, fan and other cooling device manufacturers. Your "eerie" feeling is the discomfort the industry programmed into you (and me and lots of others) with advertising, advertorials and silly reviews on hardware sites, the feeling that comes from knowing you're going against common "wisdom".
You probably would be astonished at the high temps of 386, 486 and other processors, including chipsets and other ICs. Most of these are cooled with fanless HS. My P-1 (bought ~1992) lived with a broken HS fan I never replaced for years. The HS was half the size of a credit card & almost as light. It was still going before I stripped it for odds & ends last year.
If you want low noise, unless you want to pay through the nose, get used to a bit higher temps. If your system is stable and you're not cooking anything in the system, why should you care whether it is 45C, 58C or 30C? You're not even going to own the thing in 2-3 years, right?