I ended up getting the Racers Edge SureCharge 2010 as I needed something for this weekend after my primary plan (borrow a friend's) went south.

There aren't the usual published specs for this charger so I thought I'd report back what I've found through testing:

Charge Rate: 8.0amps (90 watts max on AC and DC)
Discharge Rate: 5.0amps (35 watts max)

This puts the charger on par with the Hyperion 720i AC/DC when running on AC charging 2s-4s lipos. The Hyperion gains a definite edge when using DC power with the 20amp charge rate. Subjectively, the Racers Edge looks much better than the Hyperion and also includes a case, squid, and a removable DC cord (the Hyperion is permanently attached). The Hyperion includes boards for the 3 major balance connectors and arguably better firmware including IR measurements.