I find that as long as the color/orient is exactly what you want, blemishes are not usually a problem. I absolutely loved the tahitian/keshi bracelet I got from PP and it was swimming in colors. My eye would not actively seek blemishes. With PP the photographs are toned down to mute the color/luster so you always get a strand that is better than what you see, AND it's the exact same strand in the picture. PS does not exactly have a good reputation around here although they do have a few happy customers, but I'm not going to say much more since you could very well be happy with their product. It's not a company I would support based on the image they've projected here. There have been a few designs I've liked in the past but I could not justify the purchase given the attitude.
Aspiring ninja. Go Storm Shadow!