Web site: Mecablitz 52 AF-1 Digital
Latest Firmware: 1.0 (Oct. 22, 2012)
Key Features: tilt/swivel/zoom reflector, wireless P-TTL, HSS, metal base, rear-curtain sync, manual mode, LCD touch interface.
Reasons to Buy: Many features, excellent compatibility, decent power, excellent build.
Notable Drawbacks: TBD
Metz's new mid-range flash packs in a lot of power and features. It's a step up from the 50 AF-1 in both of those aspects.
More about the Metz Mecablitz 52 AF-1 Digital can be found on these pages:
Including an Amazon link on this page is the easiest way to display the current prices, without having to keep track of it manually or write a more-complicated tracking script. And as a bonus, there's a picture of the flash. Obviously, the ad is also an affiliate link. As with all advertising on this site, I hope it's not too obnoxious.