Hi Paul
I asked the same question a while ago:
http://www.iceinspace.com.au/forum/s...ad.php?t=39342
And based on advice from members from this forum I got 20x90 AOE binoculars, and I am very pleased with it!
It would be the best if you could look through a few of them before you buy it, places like star parties, clubs, or so.
I noticed you are from Spain and giving you AOE website would at least give you some ideas:
http://www.aoe.com.au/binoculars.html
cheers
bob