haven't heard the AH stuff, but you can't go wrong with Herron's preamps. They are outstanding overall, and really outstanding considering their relatively moderate price. I had a 1a/166 and it was a sweet unit. Would love to get my hands on a 3a someday.
You can try the AH and return it if it doesn't work out.
You can try the AH and return it if it doesn't work out.