There's plenty of pickups on the market that will retain a tight lowend. What's your budget like for pickups? Reason I ask is cause there's a range in price depending on what you want. Dimarzio I would say a D'Activator 7 it acts like a Active but with the dynamics of a passive. I'm not sure what would be the Seymour Duncan version so I'll let somebody else recommend something from them. If you don't mind spending a chunk of change the Bare Knuckle Black Hawk will work for you. It does the same as the Dimarzio where it acts as an active but retains the dynamics of a passive.
Here's a video of Art Using the Dimarzio D'Activator pickups.
[VIDEO]http://www.youtube.com/watch?v=4lYqQON-ugU]Art Rodriguez - El Vuelo Del Alma (Axe FX II + DiMarzio D-Activator 7) - YouTube[/VIDEO]
Here's a video of Nolly doing a Comparison of Alnico and Ceramic versions of the Black Hawk.
[VIDEO]http://www.youtube.com/watch?v=2qacdnnbe2k]BKP Tutorial: Ceramic vs. Alnico V bridge option for Black Hawk Humbucker - YouTube[/VIDEO]