I've spent the last two years building up sound stage equipment for a medium sized, quality sound system. I have made the major component investments, at this point, but have a few more things to get. In particular, right now I am looking to get several DI boxes. This may seem like a small issue, but there are lots to choose from.

I would like to get a quality piece of electronics, without any of the frills and features that many specialty boxes are offering. That is, I simply interested in the Hi to Low impedence, balanced output conversion. I want a unit that is clean, and capable of surviving the rigors of the road.

Who makes 'em, who supplies 'em (hopefully on the web) and who has experience with 'em?