I'm a first year in Lewes Court Phase 1, we don't have an ensuite but there's only 5 of us, 2 toilets, a shower and a bath. It's really nice and I could provide pictures of the general accommodation if anyone was curious, as when I looked around there wasn't much on the website.
However, I'd recommend going for whatever you can afford and where you like the look of. Any halls can be sociable, my BEST advice is to knock on everybody's door on the first day and invite them round in the evening for a gathering.