Google/Apple or Goldman Sachs/McKinsey best for MBA?

So I'm a CS major who is a senior at a Big 10 school who just got an offer for a software engineering job at Apple and I'm flying out to Google next week. I've got a 3.55 GPA and I'm pretty sure that I could get a 720+ on my GMAT (I got a 34 on the ACT). I've done some really cool projects with tons of leadership while in undergrad and I really want to get into Harvard or Stanford for B-School.

However, I'm also hearing back from recruiters at Goldman Sachs and McKinsey for analysts positions. I don't really have a strong preference for particular industries, and I'm willing to put up with the I-banking or consulting lifestyle for two years if that would substantially help my MBA chances. McKinsey is probably a long shot, but would I be better served by going with Goldman Sachs/BCG/Bain & Co if I wanted to eventually get into Harvard B-School?

I know that Apple and Google are really good, but it seems like B-School prefers Consultants and I-bankers. What do you guys think? What are my odds Harvard B-School and Stanford GSB with these companies and industries?