There are some books, and monthly (Orchids) or quarterly (Orchid Digest) magazines you can subscribe to. Often, they will contain pictures or articles dedicated to paphiopedilums of different types.
These magazines also cover awarded plants and their photos on a yearly basis if I understand correctly.
Below is the link to a website with basic but helpful informations on many different species.
It will have photos or paintings of each species, brief introduction on their discoveries or any historically significant informations, habitat info, and major primary hybrids (primary hybrids are plants resulting from crossing two different natural species) involving said species and their photos.
You might want to visit and have a look. It has a lot of information for you to enjoy.
http://www.slipperorchids.info/paphdatasheets/index.html
Of course, you can search within this forum or just google any specific species or hybrids of interest, and there will usually be quite a bit of informations you can find that way also.
Have fun!
Oh, and regarding the awards which many people here regard very important (and it is especially so if you want to breed these plants, or if your goal and focus of the hobby is getting awards) but not to me necessarily. Size as well as shape of the flowers matter.
There are also awards given for overall excellent culture. These are given to the plants of good size with many flowers AND in great conditions.
For paphiopedilums, the general rule is that the bigger the flower, and flatter & fuller in overall shape, the better in the world of awards.
For bulldogs (like your flower posted here), almost perfect round ball shape and very big size are considered most desirable.
Then, there are other criteria that are highly subjective such as coloring of the flowers and such.
I'm sure other members can tell you more on this as I care not too much about awards. I value what I like, not what others think is good.
When you look at photos of awarded flowers on publications and attending shows if you can, you will soon catch up on the idea and develop an eye for what is considered good.