I'm planning to move to Europe for a few months over the summer just to get out of Ireland for a while. Although the big cities like Berlin, Paris and Rome are tempting, I'd much rather chose somewhere with a much lower cost of living so I can spend my money on travelling around and sight-seeing.
I have no preference for any countries, and language isn't a problem for me as I'm a language nerd.

Which cities would you all recommend for low cost of living, superb night-life, proximity to scenery, beaches, decent infrastructure etc etc?
Any help is greatly appreciated! Thanks! =]