Hi, Currently we use Debian, but it chosen by our OS admnistrator. Now we can change our OS and it is question what Linux edition will be the best. We would like have access to new versions of Postgres as soon as possible, for Debian sometimes we had to wait many weeks for official packages.
Regards Michal Szymanski
Use whatever you want. I've been compiling PostgreSQL on Ubuntu, Debian and Gentoo so far without any problems.
Choose the distribution that you're familiar with, take PostgreSQL sources and compile as you wish.