Normally, I'd say Sigur Ros, but I have a similar dilemma:

Sigur Ros -- 5 minutes away
Nouvelle Vague -- 1.5 hours away

...and I went with the latter. But the only justification is that I've seen Sigur Ros, and I haven't the other.

Besides, going with friends.

That said, I'd still rec Sigur, as I am not familiar with the Wrens.

sigur ros, and try and get a seat. i had to stand for the whole show and my back and legs were killing me which someone detracted from my enjoyment of the show.

i don't like the wrens.