Economics develops a nice range of skills - analytic, verbal and mathematical as well as giving you knowledge of a range of concepts that are useful in a wide variety of private and public sector professions and management. In the UK, economics graduates do very well in terms of employment and earnings - one study found it the highest paying major after Law. (They did not have Finance as a separate category, but Economics paid more than Business - perhaps because it has a higher academic status and is considered more demanding.)

I think there's a lot to be said for doing the subject that interests you the most, in part because it may be what you will excel in. I suspect an international bank might be more interested in an excellent economics graduate than a merely good finance graduate.

Personally, I think economics is more intellectually interesting than finance and from what you've said, suspect you will think the same.