One solution would be to upgrade the aluminum Manfrotto 190XDB to a 055XDB. As for the head, a Markins Q10 would do a great job. You would of course be better off by getting a Markins Q20 and be set for life, instead of doing several incremental upgrading steps.
If you want a definitive sturdy and light solution for legs, get a Series 3 Gitzo carbon fiber.
The upgrade is not inexpensive but in the end you will be saving money and aggravation.