This is where I have always bought my LF Orps from, as they are local to me and breed a gazillion colours. Look at the photo gallery. These are what we would call good quality.
http://www.orpingtonchickens.co.uk/product/buff-orpington-chickens/nggallery/slideshow
We have poor quality Orps here in the UK, which we class as having too tight feathering, more compact bodies and lack of pantaloons.
Our good quality Orps are giant floofballs of buffiness! I'll try and find a good pic for you to compare. I have no idea what American Orps are like, but you can...