Which breeches should I get?

I love my Devon Aire breeches. Comfortable with a great, stretchy fit. Granted, mine have never been the full seats. And they last! It took me two years of riding several days a week to finally wear a hole in the thigh :( My new pairs have held up just as well.

The plaid Tuff Riders are cute, but I've never been a fan of TR.

There's no sense in spending a bunch of money for schooling breeches, so I'd opt out of the Tailored Sportsment (though, if you ever do want some expensive breeches, try Pikeur... most comfortable material EVER, though, like every other brand, they don't fit every body type).

You should get the tan breeches. They are cheaper and tan breeches go with just about everything. I personally like tan over everything else. Plaid is nice, but it is hard to find matching "outfits".