oh man... I just ADORE my boys!!! Personally I prefer boys myself.
HOWEVER...
My boys are 2 years old and not completely housebroken. They do not 'mark' so to speak but more like pee out of defiance. Mainly they pee in the house when Im getting ready to leave. I am a single woman who works full time though, so its been tough going to be consistent and housetrain them properly.
If you work at housebreaking and you get him fixed when he starts to mark, then you should be allset. Boys are so much fun!!! Im sure girls are too though!
Good Luck with whatever you decide!