I'm interested in finding the best DI Box... And a local engineer mentioned the Radial J-48 was the best for the $. Has anyone ever tried it? http://www.radialeng.com/di-j48-features.htm I have tried: The Countryman Aguilar's DB900 Behringer's DI Box SansAmp BDDI To me the Countryman and the Aggie were the most solid built and good for the $. Thought? Experiences?