There are a number of people, possibly even a majority of readers whose position is that Tory Euroscepticism is an Oxymoron, as the Tories are not promising immediate British withdrawal from the EU project. These people should indeed vote UKIP, and accept the consequences for the UK of more frequent Labour governments. Enjoy paying that lovely tax, UKIPERS, you voted for it.
If you believe the British relationship with Europe to be the sine qua non of political issues right now: an issue so pressing that, despite the labyrinthine complexity of disentangling the UK from the EU, it needs to be dealt with during the biggest financial crisis in nearly a century, while British forces are engaged in two (OK, one and a half) hot wars, then by all means flounce off to UKIP. The Tory party is better off without monomaniacs.
If you believe that leaving the EU would be without cost, or being in the EU is without benefit, then you're quite mad. So off you go to UKIP, where you will be welcome. The fact is, I, like most Conservatives would vote for substantial renegotiation and repatriation of powers, or for withdrawal, were a referendum granted. It won't be, not in this parliament for a great many good reasons. Clearing up the Augean stables after Labour's 13-year economic scat-party is the first priority. Education & NHS reforms are probably second.
I like most of the country, don't put British membership of the European union that high on my list of priorities, either way. The main reason for opposing an EU referendum NOW! is that Britain would (yes, it would) vote to stay in, ending the issue, probably for my life-time. Let Europe tear itself apart over the costs of monetary union, THEN secure a vote we Eurosceptics might win. I am a Eurosceptic, but I can wait.