760 is indeed a good score. Now it depends on you.
Do you want to have an 'only fin' career. M Fin will be like MS in Anthroplogy. Too much of only finance.
My 2 cents
From the post it appears that u are inclined to Finance but " I still intend to do my MBA after 4-5 years... AFTER the M.Fin

" then why not wait a little like 2-3 yrs.
In these 2 -3 years, make all attempt to rise in ur job and prove thru it that u indeed have made a deligent attempt to pursue ur interest in finance.
If u think u need formal education in Fin why not take up something like DBF ( diploma in Business Finance ) ICFAI has a good course. its 9 mths and good.
If any way u wanna add that MBA tag.. dotn jump in M Fin. rite now. Make the most of ur 2 yrs to boost up ur MBA profile.
The first Q MBA adcom will ask when you apply after M Fin is " you already have the necassary quaification to pursue ur career goal, why MBA after M Fin ". It will be though to present urslef on this to the B School.