In our moodboards posts about the Chalet, I shared some of the art prints that I bought from Art.com. The posters all arrived and are great. You can also opt for them to do the framing but this works out quite expensive and then there is the shipping to consider.
Fortunately, most of the posters are standard size and I found lots of great options at Micasa. If you are looking for frames I would definitely recommend them, as well as IKEA and Interio. Above is a peek at my DIY framing so far.