Budget? Whats your setup looking like?
Ive used a Pioneer Premier 880, Alpine 9887, and a 9886 (requires Imprint for active). My last HU I just sold was an Alpine IVA W407 DD with an Imprint processor.
All those units work very well for doing an active setup, easy to pick up and go, but still offer alot of tuning options for you as well. The Pioneer is no longer in production, but Pioneer make another unit thats even better, but it also cost a lot more.