I live in windsor. I live on the side of the hall facing away from the bar and have no trouble with noise. If you live on the other side it will be a bit noisy, but nobody across the hall from me complains about it too much, so can't be that bad. Plus being next to the bar has it's benefits. I mean, you're never more than 30 seconds from alcohol/food. You also have the advantage of being right next to the post and laundry area, so you never have to walk far. Plus you're about as close to the centre of campus as you can get living in halls.
Can't say all that much about wantage, but I know it's off campus. I know a lot of people living in wantage come to park bar (outside windsor) to eat on weekends, which is a good 5-10 minute walk.