Research MBA Programs

I graduated recently and I am thinking to study one or max two more years after this. I have no work experience and as such cannot do an MBA. I checked out a lot of schools in europe where we have the possibility to do an MsC in management. I didn't really think about checking schools in the states since they tend to be very expensive and they seem to be focused only or mostly on MBAs. But since the options are limited in europe as well and I was wondering if there are any possibilities in the states.

Can anybody tell me about programs which are similar to an MsC in the states? I checked schools like Harvard or MIT but they don't really seem to offer anything comparable..
And another question, I recently got 770 on the Gmat, does that greatly increase your chance to be admitted in schools like harvard? Or would it be only a small part of your application?

Thanks in advance