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.
I always used to sit in the East. I actually liked that you were lower down, were closer to the action and could hear a lot of what was being said on the pitch. We only switched to the West when they started the redev work. When we had the option to move back we declined, purely because it looks like you'd get piss wet through with the big gap between the seats and the raised roof. I kind of miss sitting over there, to be honest; it had a friendlier atmosphere and we got to know the people sitting around us much better. Been sitting in the West for years now but still only on nodding terms with people as we pass them on our way to our seats.