6 months philbee! Personally (and I will probably get shot down for this) I want more of a life and reduce the risk of pnd, so opt to put our little one down upstairs for his bedtime. I am not sure how viable having the baby in the same room as you for every sleep is!?
I quite like it as a possible excuse for not doing housework if she ever sleeps in the cot during the day! Agree about evenings though. There will be a point when she's too alert to sleep in front of TV, and that will mean me sitting in a darkened bedroom from 7pm and DH having to do all the chores - I can't see how it's workable really. For now we are ok though.
DD is five months and still has no problem sleeping in a bright room with the TV on in the evening. I don't think our evenings would be any different if she was upstairs, except we would have to listen to the baby monitor and keep running upstairs if she woke up. It's actually far more convenient to have her with us at the moment.