chances

Does getting an MSc in Finance immediately following undergrad hurt your chances at a top MBA ~5 years down the road?

I will be graduating after 3 years and would like to learn more about finance before I enter the job market. I'm considering applying to the top MSc programs (LSE, Oxford, Cass) to increase my understanding of finance, cure an itch to get out of middle America (currently a senior at ~100 ranked non-target), and to hopefully increase job prospects.

Also, a secondary question: what are my chances at these top programs?

GPA: 3.95
ECs: Pres of the largest student organization on campus, some tutoring, etc..
Awards: Named 1 of top 5 finance majors in the business college, National Merit, etc..
Recs: Two really good recs. One from head of Finance division and the other from an Econ prof.
GMAT: Haven't taken it yet but 700+ shouldn't be an issue. They're not directly equivalent but I managed a 33 ACT and 1440 SAT with no preparation.

What are my chances at a top MBA program? I'm currently a senior at a ~100 ranked state school.

Projected Final GPA: 3.97

WE: I worked at a nonprofit in Washington, D.C. the summer after my freshman year (all expenses paid). For the summer after my sophomore year I worked at a mid-market commercial bank as a lending intern. I was offered a job from the bank that I'm thinking about taking.

Perks of resume: I'm graduating in 3 years with ease. The University pays me $5000 per year because of scholarships (National Merit, Byrd, etc..). The only EC in undergrad was one year as President of the largest student organization on campus.

GMAT: I'm a good test taker and made a 33 on the ACT in high school so I don't think 750+ will be hard to do.

Is it possible to work as a credit analyst in the middle-market lending group for a few years at a regional bank and jump to a top MBA?