Reddit mentions of TRP RG957 Long Reach Bicycle Brake Set Black

Yeah, I followed the link and dropped the wheels and did a measurement. Looks like 55mm from the center of the mounting stud to the center of the pad. Measurement is rough because I didn't go so far as to drop the calipers ... I had to estimate the center of the mounting stud visually ... I'm sure I'm in the ballpark and a 57mm drop set should do fine.

I think these (and other) long reach calipers will do the trick.

Trying to get good info on which of these are a good choice.

Those Shimanos are just north of $100 for a set.

There's also a Cane Creek set in that price range.

I was also looking at velo-orange grand cru long reach brakeset. It's pricier at $170 for the set, but they look quite nice.

Priced between the shimano and the Velo-orange is TRP's RG957 @ $125 for the set. This may be the real sweet spot, if the ones below are "no upgrade".

The other end of the spectrum gets us Tektro R539 and also Miche Performance at ~$40 for a set?! Maybe the true "bang for your buck" category unless they're no real upgrade from my current no-name set. Nashbar has their own branded version similarly priced.

I haven't seen much in the way of reviews for the Miche or Velo-orange sets. The Shimano and Tektro brakes tend to be reviewed favorably.

EDIT: It looks like Shimano recommends 5600/6600 series levers for the R650's, so I guess they're out of the running. The TRP's are starting to look pretty attractive.