Not to be a jerk, but the problem with you not wanting to read through 120 pages, and instead posting a new thread about this, essentially means that 1) you're asking us to spoonfeed you information, and 2) more importantly, you're causing some other poor bastard in the future to have to read your thread when he's trying to get information on this. Go read the thread that has already been created and stop creating new threads when the information already exists. Obviously, if you didn't know the thread existed, then it's not entirely your fault, but you're kind of a jerk for cluttering up SF with new threads about slim fitting shirts when there are 100000000 posts already on this. Even though I'm annoyed at you creating a new thread, I'll direct you to Lands End Canvas http://www.styleforum.net/showthread.php?t=149471
The pictures on the website are horrible, but I assure you the fits on their poplins and oxfords are the best for their dollar. You can get much better shirts than LEC, certainly, but not anywhere near the price they charge. Right now poplins are on sale for $17. If you Google around, you'll find a coupon code that gives you 10 dollars off and free shipping on orders over $50. That means it'll be about $13 a poplin. If you don't like them in the end, they let you return any time, and it's ridiculously easy to return (bring it to a Sears, or mail the return back with the pre-paid postage sticker they give you). Go give them a try, they are perfect if you're 38R, 160lbs, and anywhere near 5'10" or so.