Peter Marucci wrote:While the bill tube can be deceptive (very!) it still leaves the question of wotinhell is it?

That's a good one Peter
Fact is, you are very much correct; it looks like a duck e.g. it must be one... that is, it must be one of those nifty James Bond like gadgets magicians are known for and thus, the first thing any spectator is going to grab if given half the chance.
My recommendation would be to follow the wisdom of one Mr. William McComb... use the concept being the routine but find an alternative "device" that seems more logical e.g. more innocent.
I use to love working with Bill Tubes and their evil cousin, the Niffen Tube. But that was in an era in which I was the cute kid doing tricks and prior to (or in around) the days of the Watergate scandal and the nation's embrace of cynicism -- being both, suspect and rude about everything and thus, believing it their right to rue the hell out of most any sort of performer but most especially magicians.
As to the question itself... MagicMakers is fairly reputable whereas VIKING has built a strong reputation for this sort of precision craftsmanship... then again, so has Owen's magic, but I doubt you want to suffer the sort of Sticker Shock they tend to deliver with their products.
Stay Away from "Royal"... they manufacture on the cheap on purpose; their market is for the novice and making generic items for making up magic kits or give away items used in magic shows or cereal boxes.. So I doubt you'd be interested in sacrificing your reputation in said manner. HOWEVER, if you wanted to experiment with the idea, as I suggested, so as to come up with an alternative handling, the Royal tubes may be a good move PROVIDED you are not using them in performance, just as part of your back room R & D.
