As an aside, on the whole I found Rome (apart from the Vatican and forum) a real disappointment! Dirty, smelly, litter strewn, covered in graffiti and dogsh!t, full of eastern European moochers, beggers and delinquents and over priced. Much preferred Barcelona (in 2006 we did both, Barcelona for the wife's 40th and Rome for mine).
Many years ago (1992) I did Reykjavik and that WAS expensive! Beautiful and certainly different but expensive! If you are looking at Copenhagen then how about Stockholm or Helsinki for a change? Or Munich (Oktoberfest is in October) or Krakow - lots of history, sites and (now) shopping there and not too expensive.