I ordered frames from American Frames this summer for some of my artwork. I loved their classic metal frames because their look is so clean and elegant. I first bought merchandise from them per a recommendation from my drawing professor four years ago. As a bonus to cutting your frames to the perfect (sometimes unusual) measurements, they give you a free cut mat to fit your work as well.
My favorite part, by far though, is that you can snap a photo of your artwork, upload it into their website, and see what your painting is going to look like in the frame you want to order even before it arrives at your door. You can even paint the wall behind the makeshift digital image. Yep. That's nice. I'm sold.
I couldn't decide between pewter and brushed silver on the painting above, but in the end, brushed silver looked better. Alas, when it arrived at my door, brushed silver indeed did accent quite well. Thank goodness for easier framing; I hate ruining a good piece of artwork with shoddy frame-work.