There are fewer sights more beautiful than staring down the gaping asshole of a beautiful model. So many great gapes to choose from, and many already posted in this thread.
To me a good gape needs to be meaty, with enough detail on the edges of the asshole, as to not appear simply like a dark hole. This is as much to do with lighting as it does with the model's asshole, but the combination of the two can produce spectacular results.
For example Alysa's asshole has a nice dark coloured outer edge that sinks in. With the right lighting you get a photo like the one below that is simply heaven:

- Alllysab1ggaape.jpg (21.77 KiB) Viewed 23119 times
Another favourite gaper is Isabella Clark. Just look at the thickness of that outer gape edge, and how wide and deep it is. There is a reason why she is so widely acclaimed.
Of recent LP stars of course Anna De Ville, but another star not mentioned so far for me is Emily Pink.
It's rare to see monster gapes that Emily has on a girl with such a small frame.