Thanks, Eric, for the question. Harris tweed tartan kilts are amazing, and certainly a little bit different! I think they are beautiful for country wear, though I have known some to wear them to formal occasions to make a statement.

First, I will address your question about hunting tartans.

Modern, ancient, weathered, and so forth are terms that reflect different color schemes. Essentially, do you want this tartan woven with dark, bold colors, or soft, faded colors?

For example, if you look here on Lochcarron's page, you will see the Lindsay tartan in ancient, modern, and weathered shades.
http://lochcarron.com/tartanstrome/lindsay.html

It is obviously the same tartan design, just woven in different hues of the prescribed colors.

There are other terms used in talking about tartan that reflect more than just a simple choice of color palette. For example, dress and hunting are used to refer to completely different tartans.

A hunting tartan is one that is used as an alternate to the normal clan tartan, typically woven in greens and blues, sometimes brown.

Sometimes a hunting tartan is the same as the clan tartan, with one color changed. For example, the Hunting Hamilton is the same as the standard Hamilton tartan with red changed to green. Other times the hunting tartan is a completely different tartan altogether. For example, the Hunting Robertson is entirely different than the red Robertson tartan - the former is based on the Black Watch and has its origins as a military tartan.

There is, in fact, no Hunting Lindsay tartan. However, if you wanted to create one for your own purposes, I could always have the tartan woven for you with green in place of the normal burgundy of the Lindsay. However, it is that burgundy color which makes the Lindsay tartan so attractive and distinctive, so I think my recommendation would be just to leave it as it is.

We can go either way, though. Just let me know what you'd prefer!