If I needed to Amp a Dobro I would go with a lap steel. Rondo has one for 99US.

https://www.youtube.com/watch?feature=player_embedded&v=2rjjH6_4Pqc#at=264


Flatfoot sez: Call me when 'Talent-in-a-Box' is ready to ship! -- [8{>

Got some tunes on You Tube:
http://www.youtube.com/user/flatfoot50
.
My BiaB lesson site:
http://jdwolfe0.wixsite.com/learnbiab