What kind of build are you?
I'm 6'2 and 200lbs with the same measurements "16-16.5 and 36/37" and I like my shirts to fit tight to my body like this
I've found that Nordstrom's "Trim Fit" fits extremely well and can be had at Nordstrom's Rack for around $30-$40. Also at the rack you can find Tommy Hilfiger's Slim Fit shirts for around $40. If all else fails, you can go for an Express Extreme Slim Fit in a Large.
If you're willing to go to Kohl's, they sell Marc Anthony's line of Slim Fit shirts. They fit slim all over, even in the sleeves. Make sure you try on a 16.5-36/37 as they run a little tight on the neck. The only reason I sent these back was because their spread collar wasn't wide enough.
I was in the same boat as you and actually still am. My problem is that I need a wide enough spread collar to hit the lapels on my suit. All of the wide spread slim fits that I've tried on (other than Hugo Boss) have collars that fit and look like point-collars on my neck. Now I'm going to wait for my Express 1MX Extra Slim Fit spread collar shirts to get in and if the spread on the collar is wide enough, then I'll be a happy camper. If not, then I'll use the shirt measurements on the Express shirt and order a custom one from modertailor.com
Ahhh, we'll see in a week or so!