I've used a bunch of different boots, from Danners to several European brands. The best boots I've found are from Kennetrek, they're not too cheap, but they are the most comfortable boots I've worn for the widest variety of conditions.
After Optics, I think what you put on your feet is pretty high up on the list of most impt piece of equipment.
The Danner Talaus boots are good for the money.