Election day no.1

So...what I am going to do?

When I talk to Tories, I feel that I must vote Labour, as their views appal me - its right back to having a bash at foreigners and poor people

But how can I vote for a Labour MP who
* supported the war in Iraq?
* is a passionate opponent of euthanasia - indeed, its just about the only thing she is passionate about? I equally strongly support it.
* seems to regard her role as being some sort of local mayor?
* employs a lifelong Tory voter as her speechwriter?

Politically, I'm now closer to the Liberal Democrats. But if I vote for them, will it let in a Tory to this seat? And if so, would that mean a majority Tory government - which I do not wish to see.

Its a dilemma.