The cohiba siglo VI is different from a siglo II in flavour profile. It's one of my friends favourite production cigar and one of my favourites but it's not a short smoke. Much better than the more expensive cohiba behike IMHO but it does make every cigar after not quite measure up lol
There are numerous online vendors but have a look at this one http://www.cigarsofhabanos.com. There are a few things you can do to make any purchase reduce attention in postage and better sites for different cigars but the owner of the site does lots of sales and will email you a box code list if you are picky about when and in what factory they were rolled.