I think Southpark Terrace or Park Circus will suit you better than Murano or Cairncross. They have a purpose in life, but that purpose tends to be for partying 18 year olds. Even most second years cannot envisage going back there once they've had their wild first year. It would drive me nuts living within half a mile of those places, to be quite honest with you.
Meeting people is going to be up to you anyway: There are some that live in a place with 1200 rooms and make friends with the other three people in their flat. So it goes. There will be a ton of events to go to at FW during the day and night (I'm working on them as we speak), but no matter how much is put on by the university, the unions or the societies, it still takes you to strike up conversations. Bearing that in mind, you won't have too many problems.