Welcome from Phoenixville PA!

No matter WHO you buy from (USAK, SWK, SK, Canada Kilts, etc), the biggest thing for you will be length... at 5'8", you'll be ROUGHLY a 20" length (if worn at your "jeans waist") or 22" length (if worn at naval). Longer kilts can be shortened by your local tailor for a charge, although many companies in the "lower price range" offer custom lengths.

You've got a good start. This is a great place to get advice on ANY kilt company you come across and there are lots of threads here comparing different companies.

Best of luck with your decision. As long as you do your homework and you know what to expect, you'll be happy with WHATEVER kilt you get.