i live in senghennydd hall, not court. court is really not that nice, ive been in one flat and its not pretty. hall is really nice, we get ensuite and an evening meal (tho its not all that and i end up cooking for myself later on anyway). i live in a flat with 10 other people so its pretty huge, but i think we're one of the biggest flats. the train line is not a problem at all, i dont even notice it even more, more annoying are the people in the courtyard, drunk, making loads of noise when ur trying to actually get some sleep (ie. 3am this morning). senghennydd definately has the best position, ur right in the middle of town and the uni, so you can just literally roll out of bed at 8.45 and still make ur 9am on time in the humanities building - as i am (as i have done far too many times this term...). you can also just pop into town whenever you feel like it, without it being a mission from pretty much everywhere else.
hope this helps everyone.