Given your planned uses, you might be best off with USAK (definately over SWK. A good product, but apples and oranges quality and fit).

Normally, though, I would agree with Jock. If USAK is in your budget, then a mere extra $100-150 more saving would get you a stunning machine-made "tank" from any number of vendors. But, it sounds like rough use you plan for this kilt?