This. To keep the atmosphere/ closeness to the pitch is a MUST! Building a huge stadium that will be half empty most of the time is a MUST NOT! I think as others have suggested the way to go is to build a stadium at a size which we expect to fill for most games now with as vertical as possible stands, but with easy expansion possibilities, upwards and as vertical as possible.
SB we like the Stadium threads and all that is missing is a few pictures of the Euro stadiums that we want our to look like.
A smaller version of this wouldn't be bad... http://urbanity2.blogsome.com/2007/07/24/new-athletic-de-bilbao-stadium-spain/
Wasn't there a really mad one with black and white seats that someone (think it was one of the Norwegian guys) posted on an old thread? That looked really initimidating (and not just the colour scheme).