University for UK Master degree in Finance/Business: queen mary, royal holloway or city?

I was in the same dilemma as you. I had also received acceptance to RHUL (MS Management) & Queens Mary (Finance/Investments). After doing a bit of research on the programs/talking to a few employers, I have accepted RHUL for MSc Management. The reputation is excellent and yes through the dissertation & electives you can emphasize on finance by taking corporate finance & investment management (which is what i intend to do). Their competitive advantage is that their degree is accredited as an MBA. Overall, RHUL is one of the top schools in London (after all- you do get a university of london degree)