Personally i like a level of elevation that only the west stand can offer. Gives you the best overall view of the pitch and team shape and formation in my opinion.
If price matters to you, then go with the north. If it doesn't and if there is availability then have a look at low numbered seats in the West, that's where the majority of the noise comes from.
i don't think i would sit in the East if someone paid me to. On the plus side i guess if you are sitting in it, then you don't have to look at it like i do from the West.
Price doesn't really matter, I'll see what is available in the West.
I always tell people the benefit of sitting in the East is that you can't see how bad it looks!