I too am a "Man of Substance" (5' 11" 340 lbs).

Currently my only kilt is a SWK Thrifty, a great starter kilt to see if you'll like wearing a kilt. Now that I know I do, I am chomping at the bit to get one which I can wear at the "proper" height. I have found in my experiments that the kilt looks much much better when worn at the traditional level, it's just that by then it's too short for me to be comfortable with.

I would recommend that you cover your substance and enjoy a traditional kilt.

Cheers,