I'm with The Greener Side, on this one.
You will want to look into spending a wee bit more money on your field boots. They will be well worth it. I have a pair of Ariat Heritage field boots and I have to keep them hidden under the bed so that I don't ride in them all the time. I like them much more than my paddock boots and half chaps.
They took about a month of solid riding (hacking about 5 days a week and jumping 2 days a week) before I could drive in them and walk around show grounds in them all day. Now, they are my favorite. :)