If the press is going to come up with dubious statistics covering economics and the EU, I guess it’s slightly better if they’re pro- rather than anti-Euro.
But in the realms of sensible argument, we seem to be beyond the phase of using economics to sway the Euro case. From the economic research, it appears that the likely positive or negative economic impact of joining is smaller than the margin of error in forecasters’ figures – respectable economists are entirely split on the cost/benefit analysis.
This means we need to make our Euro decision based entirely on personal prejudice and conjecture, which has the pleasant side-effect of making life much more fun. Since it would make travelling in Europe easier, would save my employers forex and hedging costs, would mean we had an exciting set of foreign coins to look at, would make it much harder for swivel-eyed loons to pull us out of the EU, and more generally woud annoy the swivel-eyed loons a lot, I support the Euro.