Heh, prescient topic. I've been struggling with that of late as a cyclist (talk about thunder thighs...). I much prefer flat-front, as pleats tend to give me too much room in the crotch, even though the thighs are nice. I tend to do what several others have suggested, which is buy something that is fairly tight (but still fits) in the thigh, then bring in the waist to fit. Maybe taper the calf if it's needed.