apc new standards. they're cheap (around 160), straight leg (can be as slim or loose as you want depending on how much you size down), and fade really well quick.
be sure to check out the apc sizing thread to get the gist of the sizing more, it's quite a pain (the denim streeeeeeeetches like a mofo)
personally i wouldn't bother with nudies because i find the stitching and back pockets to be hideous, and i hear the denim isn't that great (i don't think apc is much better, but i've heard about more blown crotches w/ nudies than any other)