Adler, Akinfeev and Lloris all have a PA of 185, and start at CA's of 165, 165 and 168, so statistically speaking, they are the best, and it's more dependant on personal preference. That's with the exclusion of Casillas etc.
Alphonse Areola can be bought on a free (compensation of around £800k) and turns into a really quality keeper. Also Delac from Chelsea if you can get him. He is again about 16 and already has international caps. He turns out to be as good as Petr Cech used to be. These are younger options. For an established keeper, as said, i am a big fan of Akinfeev. IRL one of the most underrated 'keepers in the world.