Greetings most respected company!

I am looking for some help re. purchasing my first kilt, of Traditional style ...8yds (approx) heavyweight.
I see probably the best buy, would be one of the ex-army kilts seen on ebay from time to time.
My question is;
Would it be OK to wear such a tartan as issued to a Scottish regiment?
I do not want to appear to be 'pretending' to be something I am not!

In reality, we do have connections with a few different tartans, but as the "Taratan for every name" thing is relatively 'new' I am not wanting to approach this from the strict Victorian standpoint.

If this sounds a bit confused, it is probably because I don't know the questions, never mind answers!

If it's any help, My wife's family is MacCrumb/macCombe, and is supposedly associated with Clan Mackintosh.
On my side, part of the family has spent 400 yrs in Co Kerry,...so a district tartan could also work, and Ayrshire, and is supposedly associated with the Boyds.....but this connection might be more of a way of selling tartan than anything else!
Sorry for rabbiting on, If it's easier, please just give an answer to my first Q, Re regimental tartan.

All best,
and thank you in advance,
Micric.