my only concern about the soundsystem is its ability to clearly reproduce the songs' arrangements, which tend to be quite acoustic, and the voices, particularly Leonard's baritone/bassoon tone. The venue should bring no problems as it is a flat and open space without hard obstacles that reflect the sound thus making things tricky.
I guess it doesn't depend only on the material (on the "bananas" and on the mixing/amplifying), it deals also a lot on who's in control, but normally the production should reflect the tastes of the artist therefore I'm not worried.
About the Port wine (which is a special quality amongst the Portuguese wines) you should indeed try a good one (after jetlag recovery, blah blah...
).Cheers,
..And am I right in thinking that the "home of Port Wine Making" would be further North??..(Perhaps I should not be having this conversation here now as in fact we are not talking about dear Leonard Cohen, but its turned into travel advice...How would the adminstrators see that do you think... 
But I reckon we should keep at least a foot on the ground otherwise someone gets annoyed, reports an abuse and then master Jarkko may feel forced to show us a yellow card (and send us to the sin bin - preventing us from posting- for some time) 
So we will keep talking about this till we get the yellow card then eh.... 
I am glad you are telling me this, as I have all these books from the travel agent about the train, the tours etc, and in fact when I looked at the map of the country I thought that I could come back up the coast to the North by Porta (after the concert) and cut across the middle back to Spain and miss Lisbon. ..with a loop!...But I cant do that... its a train all the way back from where I came?.(the inland is obviously high and mountainous, like parts that are inland from here)....never mind..I will be buying one of those bulk several country train tickets (in New Zealand), and it was suggested to me that in fact I could spend days in towns/villages/the country and then get on the train and travel through the night which saves a hotel cost every now and then...So I could actually do it like that from Porto if Im covering "old ground"....Your descriptions of the country are so wonderfully vivid, you are a great ambassador for your country...I think I must come up and see around Porto!..(Sounds a bit like Central Otago,) So how long will it take you and your friends and family to get down to the concert...is it about a four hour drive?? ....
at duty free...unable to do that any more??.....darn....might have to buy a nice bottle of port to take with me around Europe,as Im seeing friends further on in Italy......(one glass of that will be all the sleeping pills anyone should need!).... 
..I think not, they are probably now using some sort of hygenic and sterile production in steel containers??..(like the vineyards here).I guess I was just sitting getting carried away in time listening to your vivid and historic descriptions .....oh well...you can see I am really looking forward to first "the concert of the century" and then the tour of the surrounds after that...
Luis, where are you man? your input has been valuable, is this something that you and your friends would be able to help us organise. Do you know the area around the concert venue well enough to think of a place we should all meet after the concert?...