I came to this conclusion too a few years ago with lots of gigs abroad without my own amp and gigs in the UK where they would produce Behringer (and worse!) DI boxes to plug into.
My experience is that slightly smaller boxes (Aguillar Tonehammer / MXR DI / or similar) are very good build quality, fit on a pedal board and provide a sound quality which is basically as good as the U5 / REDDI. They're cheaper and more portable too (both the U5 / REDDI are an extra bag / flight case). So that's where I'd look.