Best plugin to edit database?

I'm wondering if anyone here has a favorite database management plugin? I'm merging a bunch of single-site installs into a few Multisite installs. I just want a simple way to search the database for "domain.com/wp-content/uploads/" and replace it with "domain.com/files/" so as to quickly and easily fix the most commonly broken thing when I do the move. I could do this through phpMyAdmin, but I'd prefer a nice, simple WP interface if possible. Let me know if you have any preferences/suggestions. Thanks.