what weight tartan for my kilt

[xman]

Would heavyweight or mediumweight be better for the kilt?

I don't have any medium weight kilts myself, but the ones I have seen and sewn seem fine for gentlemen to wear. That said, it is a common feeling that the heavier cloth makes a better kilt.

Does HoE do traditional selvedge? If so, are they the only weaver other than Dalgliesh?

Untrue. Strathmore weaves their cloth with a traditional selvedge. HoE has many plaids that use a traditional selvedge and some budget cloths that don't. Their MacDonald Dress tartans are, I believe in the former category.