wide-grip ull-ups/pull-downs, db/machine pullovers, one-arm db rows all great for lats...
any pulling movement is gonna hit your lats/bi's hard, whether its close or wide grip, but wide is better IMO, rows build thickness more than width, so you need to address your main weakness and work on it or go 50/50 and train for both thickness and width.....
the best back builders:
romanian deadlifts ( power )
bent-over rows ( general back thickness )
pull-ups/chin-ups ( lats )
shrugs ( traps )
AbcBodybuilding.com - great site...