Re: Lian Li B12 --
Anyone who has owned Lian Li cases over the years is likely to keep buying them. No matter whether there's a premium to the all-aluminum construction -- Lian Li just works better.
My latest build in a B12 case continues the same tradition of a half dozen previous builds, all in "silent" cases. Sure, the aluminum feels a little thinner than the V1100, V1200 models, but the interior design has been improved, and it's nice to have quick-change/removal options for drives. The reduced weight is welcome, since LL no longer puts wheel casters on their cases. One SSD and two HDs is enough -- I haven't found a reason to have a second SSD beyond the boot drive, but have 32GB of RAM in my latest build (with half of that configured for a RAM drive).
The only place I'd fault the B12 is the two (only) external drive bays. I prefer separate burners for DVD and Blu-Ray media. I also require an independent fan controller, but there's no room (unless I machine out an additional mounting slot in the aluminum.)
To get around this I bought the "NZXT Sentry XLE" controller, despite a lot of negative comments about construction quality. Hope this dongle lasts, and works better than many other people have advised. Someone is shortly going to come up with the idea of a mini-USB port for an Android tablet, which can access/display/control PC internals such as fan speeds, temps, OC settings and the like. (Beats trying to use a tablet for something beyond its horsepower. And you can easily develop verbose Android software that's better than most BIOS screens.
Another note -- This Toms Hardware review attempts to correlate between case heat and noise, but to me there's never been a correlation. Noise is the only issue, because four "silent" desktops in close quarters still make a bit of a hum. Heat, such as it is, is better solved by liquid cooling, anyways -- especially if you can route the waste water's heat completely out of the room.