Rever's Attack two-piston brake costs $95 USD per end.
Rever, an off-shoot of Jagwire, might not be the first name that comes to mind when thinking about brakes, but their mineral oil-based Attack and Arc models appear to be straightforward, gimmick-free options that could make sense.
The Attack is their lower-priced model that sells for $95 USD (without a rotor) and sees a sturdy looking top-end combined with a two-piston caliper, all of which comes in at 235-grams. Rever was refreshingly straight with me - the Attack isn't meant to blow minds with its technology, but simply be a reliable, powerful brake that'll sell for a reasonable price. Up top, you're looking at a left or right-specific design with a split clamp, a two or three-finger lever blade, and a reach adjustment dial that skips the tiny hex key.
That funny looking orange thing is a vented aluminum extension meant to help dissipate heat, much like the fins on Shimano's IceTech pads.
Down at the wheel, the Attack gets a forged caliper that's home to a set of 22mm diameter pistons. You can also spec their 'Heat Dissipation Cover' Shimano-compatible pads that combine a vented, 0.6mm thick aluminum top panel with 1mm thick steel backplates.
The Arc brake is positioned a bit more up-market than the Attack, with an MSRP of $105 USD (without a rotor) and a host of upgrades over its less expensive brother. The most obvious is up top, with the Arc sporting a much slimmer, pared down perch. Internally, it uses a dual bladder design that said to save weight while also making it easy to run the brakes moto-style or the proper way, and you can choose from a two or three finger lever blade.
The caliper is different, too, although it's difficult to spot. You'll find a set of 24mm pistons in there if you look hard enough, with Rever saying that the larger diameter supplies more power than what's used inside the Attack's caliper. Total weight is about 15-grams less than the Attack, too.