I own two Stillwater Standards and two USAK Semi-Traditionals so here are my thoughts:

My first kilt was a Stillwater - it was kinda like a "training kilt." I really didn't know how this whole kilt thing was going to work out for me, so I deceded to start with an inexpensive but well made kilt. It was so much fun, I got another. Since they were my first kilts, they will always hold a special place for me.

The Stillwaters represent great value for money and Jerry's customer service is amazing. The waist/hip sizing is "generic" so its bound to be pretty good for a lot of guys - but not great for anyone. The acrylic fabric is soft to the touch but is more prone to pilling, stretching and wrinkling. The bottom selvedge edge is also bound to "wander" a bit. They feel great to wear but the pleats don't hold a sharp edge unless you work at it a bit.

Unless you're getting an off the rack kilt, the USAKs are made to measure so the fit is fantastic. The PV fabric is available in a large number of tartans, durable, and much less prone to wrinkles. I believe its also teflon coated - which is nice. The PV pleats hold a crisp edge - even without the permapleat sewing. Again, customer service from Rocky and Kelly is fantastic.

Now, this is just MY opinion - I like my Stillwaters, and I love my USAKs - but I should they are a bigger investment.

I hope this helps!