I just ordered a pair of XL from motorcyclecloseouts.com. $88.89 after shipping. My Joe Rocket pants are XL (36-38/33) so these should fit well.
If you were torn between large and XL sizes, I think you'll be happy you went with the larger of the two. These pants definitely run small. I just received mine (in 2XL short) and with the liner in they are pretty tight around my legs and in the crotch while sitting on my bike with a pair of jeans (Wrangler, comfort fit, 40" waist, 30" inseam - which are pretty loose on me) underneath. My legs are pretty big around, and right now I wish I had ordered one size larger than I did. Without the liner the fit is decent, so I will probably skip the hassle of exchanging them for the next size up.
I live in Georgia so it's unlikely I'll be riding much in weather where the liner would be needed. In fact, these seem like they would be warm enough over a pair of jeans that the liner would be unnecessary on anything but a snowmobile, so even in upstate NY where I used to live, I doubt I would opt for the liner too often, if at all. Call me a wimp, but I don't like street riding when there's likely to be ice on the roads.
At the same time I ordered the Mercury pants, I ordered a Fieldsheer Highland jacket. If you are thinking about doing the same, be aware that they also run small. I normally wear an XL or occasionally a 2XL, depending on how its cut and what I want to wear underneath. The Highland I got is a 3XL, and while the jacket otherwise fits okay, the arms are VERY tight with the liner in. It seems like they stuffed a 3XL liner into a 2XL jacket, although even without the liner, the arms are fairly tight. (Yes, my arms are big too.) This one may go back.
For informational purposes, I'm 5'10" and 230lbs. Built like a middle linebacker, with a bit of additional age-related padding overall and a little extra helping around the waist.