I know you say you have a 'preference' for a girl - but you never know when a dog may just 'appeal' to you regardless of sex
Worth looking at them all - may not be for you but you may be able to point someone else in that dog's direction.
Mark - it would be lovely to see that boy rehomed
I fostered Louie knowing about his aggression and he has found a new home ( not in it just yet! ) - there were ways of managing his aggression and hopefully the same could be done for the one you are seeing so he can get out of kennels as you don't often see a dog's true personality until out of that environment.
Louie was changing week by week - for the better i may add!