I got some bad news this past Sunday, my uncle (my father's youngest brother) died of a heart attack at 55. I will be attending the funeral on Friday and I want to insure that I dress appropriately. I am planning wearing my black Argyll jacket, white shirt, black or navy tie, black hose, and black dress shoes. My question is which kilt to wear. I have a choice of the following:

USAK semi-trad in Blackwatch tartan
UK Heather grey mocker
SWK Heavyweight shadow tartan
SWK Standard Nightstalker tartan

I am going to go search for the pic Graham posted when he recently attended a funeral. Any help would be appreciated as I have to fly out this evening for the funeral.