My two cents.
I don't know if you have a lammles where you live, but they have a boot in there that's a square toe ariat. I've got a mens (in a very small size lol) in a bulls blood color, and i've got distressed ones from the womens, both fit me very well. I also have a wider foot, so most boots feel too narrow, but these boots are very comfortable. I have actually bought the same boot twice cause I wore out the first pair (and they ended up cracking because I missed giving them a good oiling before the mud season hit, which is a good lesson, always take care of your boots!) so if you are sticking with western riding, it's worth investing into a good pair of boots. If you go to a Lammles, the staff ussually get training in how to help you get a perfect boot (i know they trained me when I worked there, quite a bit and I never had an unhappy customer) they will help you get the best fit and make it worth your buck.
A tip is, if you get some boots, wear them around the house first for about five hours, to make sure they are comfy, if they aren't you can return them most likely cause they will still look totally new. They cost a hefty amount of money, so you want them to be comfortable!