What's the best Django search app?

I'm building a Django project that needs search functionality, and until there's a django.contrib.search, I have to choose a search app. So, which is the best? By "best" I mean...

• easy to install / set up
• has a Django- or at least Python-friendly API
• can perform reasonably complex searches

Here are some apps I've heard of, please suggest others if you know of any:

• djangosearch
• django-sphinx

I'd also like to avoid using a third-party search engine (like Google SiteSearch), because some of the data I'd like to index is for site members only and should not be public.