in my opinion, what sort of suit, and whether a suit is necessary at all, will widely depend on what sort of job you are applying for.
For banks, insurance companies, law firms, and other similarly conservative organisations nothing will beat a dark-gray, single-breasted, non-padded, good-fitting suit, with a hint of a pinstripe - the narrower the better.
Shirt in a pastel colour or white, tie suitably non-provocative, black shoes, long socks.
For a position as, say, an engineer in an industrial environment, or as an academic, or any position in a sales organisation, a gray jacket, suitable trousers (no jeans), black shoes, uni-shirt and tie; or: tweed jacket, cord trousers, sensible shoes, and so on.
It rather depends on the company you intend to work for.
In the company I work for, three of the board members don't even own a tie, and never have. We have no dress code, not even for sales people with direct customer contact; and short of indecency, no problems with what you wear in the office - someone in a banker's suit would stick out like a sore thumb, and probably make the interviewers so nervous that they'd pick someone else....