Which fuel pump?

I had originally planned on reusing the stock fuel pump that came with my 440 motor out of a new yorker. But now I'm having second thoughts. I'd hate to drop $200 on a new fuel pump if I'm not going to notice any differience. Should I run the pump thats on it now, buy a new $40 cheapo one, or buy a performance mechanical or electronic pump? Another question. How much horsepower does the mechanical fuel pump eat up? I'd prefer to stay mechanical to keep things simple but if electrical is worth the hassle I'll do it.