While JBL still offers the 4400 series of studios monitor, the LSR series is a more modern and accurate design. I used the self powered LSR28P model in a secondary system with excellent results. It's smooth, detailed, dynamic, images well and his non-fatiguing.
This is the link to their website with descriptions:
http://www.jblpro.com/pages/recording/prod_r_b.htm
This is the link to their website with descriptions:
http://www.jblpro.com/pages/recording/prod_r_b.htm