Personally, I prioritise quietness over look. And obviously, I havent heard your system. I dont doubt the look is a very strong selling point. But if you also aim for people seeking quiet PC's, especially DIY silencers, I think you'll have a challenge in convincing them about the level of quietness.
In this SPCR thread about fan basics
, thumb rule no. 4, recommend avoiding 60 mm fans. Because small fan blades, means more RPM, in order to move enough air for cooling. The more RPM, the more noise. A 80 mm fan can move the same amount of air, with less RPM. Not to mention a 12 cm fan, which are quite popular around here.
Pabst certainly got a name. But no Pabst fan have made it to the SPCR recommended fan list
I dont know the Thermaltake cooler you mention (couldnt find it on their website, by the way). In the SPCR forums, Thermaltake often get quite bad comments, due to noise. This recent SPCR review of the Big Typhoon VX
seems to backup those comments... From the conclusion: "Even the mention of the word "quiet" on the VX's product page is offensive. 16 dBA is its listed SPL at 1300 RPM, but the only way it could measure this low is from several rooms away."
Though, the original Thermaltake Big Typhoon was a very quiet, good looking and reasonably priced CPU cooler. The cooler you mention might be just as good. But personally, I've spend quite a lot of money on products, which was claimed to be quiet - but they wasnt, and now they collect dust. So I dont take chances anymore.
As mentioned, the case have a very great look, and that alone should make it easy to sell. But maybe it's possible to incorporate even more quietness, without compromising the design? From my point of view, that would make it a winner, and I think the looks deserves it. But then again, it's a valid choise, not to include those critical DIY silencers in the target group. It might be quiet enough for many people as it is.
Just my 2 cent.