Suggestions for birthday dinner in Barcelona?

[CN150]

If you were to choose one restuarant for a birthday dinner in Barcelona, which place would you choose?
Preferences:
open on a Tuesday
romantic upscale dinner for two
I'm a big foodie in regards to how things taste (presentation is nice, but taste is most important)
haven't decided if I want a molecular gast place or not
budget is quite open

Thanks in advance