The only feasible option Scotland has if it decides on independence is adopting the Euro, and that's if the EU lets it in.
The SNP seems to get dumber by the day (although Westminster isn't that much better). Independence + the pound is pretty much how things are now. The next best thing would be introducing Scottish passports and demolishing the UK name and flag (instead having the countries referred to as Scotland, Wales, England, and Northern Ireland + their individual flags) which I would welcome, personally (even though it would be like the Eurozone, but with more democracy).