Sweden or Iceland would get my vote. New Zealand is a popular option for Brits. Ireland I'm not so sure about; their massive economy growth was funded by EU grants, and now the EU is turning its attention to the former Warsaw Pact countries. Romania or Estonia would be a good bet. A lot of Western companies are buying their IT services there now, where you can fly in for a lunchtime meeting, rather than India. They're stable and everyone speaks English for business.
The big risk to the Scottish economy is that the SNP finally win Scottish independence and Westminster cancels the GBP 45Bn (approx USD 100Bn) subsidy from English taxes. At that point, unless the EU steps in, the Scottish economy will plummet like a rock.
Of course, it's also possible that they can replace those with EU grants as well.
However, looking like continued devolution is much more likely than independence in the near future. I believe the polls show only about 1 in 3 adults supporting full independence, but most support continued freedom [e.g. continuing in the vein of having a parliament again].
The elephant in the corner is the West Lothian problem.
And over and above that, the Scots have got nowhere to vote. They can't vote New Labour, they won't vote Tory, the Lib Dems are a joke, the SNP is about the only way to vote up there right now. If the SNP force the issue, the West Lothian problem may not be resolved in a way that favours the Scots...
The big risk to the Scottish economy is that the SNP finally win Scottish independence and Westminster cancels the GBP 45Bn (approx USD 100Bn) subsidy from English taxes. At that point, unless the EU steps in, the Scottish economy will plummet like a rock.