Another very good solution for a QA Management suite ist aqua. It includes like Quality Center the test, requirements and defect management but also a project management module. It is really user (and developer) friendly.
You also have the possibility to use different test tools directly from aqua to have the flexibility to select the optimal tool based on your automation needs independent from the test management.
We use it already in multiple projects and I got very good feedback from all project members (developer, tester, project manager, ...)
