I found a field tartan kilt through The Celtic Croft (Kilts-n-Stuff.com) for about a C note. Seems like a lot of rugby players, and outdoors type chaps like a less expensive field kilt, as well. Their catalog usually lists pictures of the various tartans, usually about half of them in each issue, the current one only has the most popular homespun weaves; there are about 1500 recognized tartans. I think they have a complete list on their website with pictures, or link to tartans.com.
Kyle, luckily, you don't have to be Scottish or Irish to wear a kilt - Samoans wear a non pleated short kilt, and so do several other cultures. The rule is simple, if you like a particular tartan, buy it and wear it! You should know what it is though, you'll get questions! For work, it doesn't matter! CC has 3 utility kilts listed. I can email you that page, if you like.
Hawkdancer