Very well said Kevin. You got right to the heart of the matter. I was sat here thinking of how to express my view on this, but you said it much better than I could have done.

Most of the debate seems to be restricted to economic matters, and in my view the fact that Iceland, an economic minnow with a population the same size as Coventry, negotiated a trade deal with China, why could we do at least as well, if we were free to do so ?
We are the 5th largest economy in the world. Our economy is becoming more dynamic, while the rest of the EU is in a downward spiral with no sign of recovery. Our trade with the EU is falling fast while trade with the wider world is growing faster.
I could go on and on......
Economics, trade, etc. is not the most important factor though. If we allow it to become so, then we have allowed ourselves to become economic slaves.
The EU is utterly undemocratic and becoming less so, with each new power grab. Despite what Cameron says, the ratchet will only ever work one way. Its only possible chance of success (without reverting to being a common market) is through much more integration on everything from taxation to defence.
Its at a mid point in that regard currently, and it isn't working. It needs to either select reverse gear or go full speed ahead, and Juncker has already said that the EU doesn't have a reverse gear.
If we vote to remain, once the dust has settled, further integration will happen and happen quickly imo.
I cannot see how we could end up suffering as a result of leaving. It is against EU and international law to take punitive action against a state which leaves, and that is beside the fact that we are the EU,s biggest export market and have a much bigger stronger economy than most of them put together.
We would be in an extremely strong position to negotiate a very favourable trade deal with them.
But even if we weren't, I would rather be a free poor man than a (relatively) wealthy slave.