With cats, it's nearly always the boys which are more affectionate and loving - more so than girls! I'd say go get the boys :) They will get along better but neuter them, as otherwise they will go looking out for a mate and could end up in trouble, my cat did when he was 1 years old. Stuck in a tree for 3 whole days! A HUGE tree too, had to call the fire brigaide to get him out! So definetly neuter them I reckon! I did this to both my cats, and they never search for females anymore :) xx
Owner of 2 male cats, had them since kittens, now 8 years old! x They are both brothers - they are v. close!