I didn't see this one until today, but I'm going to have to vote for the AC Arrivals lounge as well. Stop there for a shower and maybe take a look at the breakfast to see what one thinks, then head over to T1 and the *A Lounge. Pick up a coffee to go for the walk over.

I haven't been over to the BD domestic lounge in a really long time so they may have done something nice with the place, but unless they really, really did something magical it's certainly not comparable to either the Arrivals lounge or the *A lounge.

Note: I have never been able to really get the wifi working at the arrivals lounge and there is a serious lack of power plugs in the *A lounge. They exist, but they're rare.