I'd go to /tip/, there are maybe two reasonable recommendations in this whole thread
From what I remember Bill's was bought out and has been going downhill for a while. Looks like the founder started a new brand called pennbilt very recently but I don't know much about it.
Bought a M2 fit pair a while ago and was happy with it. Only reason I stopped wearing them was lifting making my quads bulbous, but I've heard good things about their wider M1 fit too so might try those. They're basically one of the default recommendations for khakis along with O'Connell's, Bill's (like I said I'm not sure about them currently), All American, and Orvis.