Anywhere in Northern Europe
Kiev is still very very cheap, quite a fair bit to do, the people are OK the younger generation are really nice, the older generation might as well be Scottish and just really grumpy and depressed and much preffered it when you could get only one flavour of ice cream.
Vilnius is nice, plenty to do, but it normal prices.
You could try Tallinn and a day trip to Helsinki and do two countries, which is what i would recommend and really good fun
France/Spain/Italy/Spain is just a rip off imo.