Hi Steve,
Having only dealt with 3 different kit manufacturers, Billings, Artisania, and Graupner, I would choose them in that order. Built the Smit Ned, Calypso and Emil Robin from Billings, Amsterdam from Artisania, and Elmshorn from Graupner. So, although I have seen some very nice tugs out there, I'm not able to voice an opinion on them.
Norm