I'm graduating this semester with 3.36 GPA. My school is ranked around the 80s by the US News for its undergraduate business program. I double majored in Accounting and Finance. My goal is to get into a top MBA program (not necessarily HBS or Stanford, but the likes of Kellogg, Columbia, UCLA, or even Stern and USC would be just great).

Now, assuming I get a high GMAT score (670+), which I would invest alot of time to attain, what kind of work experience would help me the most to get into a top MBA?

I have two options, either to work for 1) a Sovereign Wealth Fund; or for 2) PwC on the financial advisory side. I intend to work there for about 2 - 3 years. Many people told me that a Sovereign Wealth Fund work experience would be prestigious, unique, and surely differentiate you from other applicants as admission committees are looking for diversity in backgrounds to bring in a different perspective in class (what are the odds that there is another international applicant having the same background in an SWF?). However, others told me that PriceWaterHouseCoopers is very prestigious and highly reputable firm in financial advisory (and big 4 in actg), and admission committees at the top schools still hold notions that working for a big consulting firm is the best you can bring to the table along with I-banking.

So, which of these backgrounds would help me the most (taking into consideration my undergrad) to get into to a top MBA? What might impress an admission committee more?