Which project management tool for small team/multiple parallel projects ?

I have just been appointed as the IT manager of a small web agency. One of my first job is to find a tool for project management. The required feature set is relatively straightforward:

- create projects with deadlines

- add tasks with duration estimation to projects, and expected time of execution

- assign tasks to people

- check if the deadlines are doable

- allow people to register the real time spent on every task (=filling timesheets). This would be useful to bill clients.

- offer a dashboard to every user showing the most urgent tasks and deadlines (in a calendar view, as much as possible)

I have been evaluating OpenERP, but the UI/UX is really too bad, especially for a web agency, and it does a lot more than strictly necessary. We are also trying Basecamp, but it lacks scheduling and reporting about timesheets.

Finally, I ended up on wikipedia with this page:http://en.wikipedia.org/wiki/Comparison_of_project_management_software

There are way too many options to evaluate. What is the Hacker News crowd using ?

P.S.: For us, it could be self-hosted (I could manage installation on a server) or SAAS, but should not be too expensive (basecamp prices are acceptable). Plus, it should not necessary include a bug tracker.