We can attest first hand to the excellent braking power of these TRP's, and although they have a traditional aggressive canti design the arms don't stick out too far so for most set-ups rear heal strike shouldn't be an issue.
Best all of though, these high-end canti's have an unbelievle price of just $70 for a full set, including all required hardware. We haven't asked the shop owner why they're so cheap (the MRSP on the manufacturer's website is $149.99 US) but frankly we're afraid to alert him to a mistake - come and grab these (we have a few sets in stock) while this great price sticks.
FYI, the sets we have in stock are all black, as pictured here. The brakes also come in a really cool red anodized and silver, though we suspect if we ordered those in the price would be closer to the MRSP mentioned above.