Cactus, After having traveled alot to the Virgin Islands I am familliar with Bullchands, This was the first place I laid hands on the then cutting edge Ziess 10X40 BGA's.I had to have them! Beware of the Gray market products sold at these places!Some day......you may need to have your glass serviced under warrenty. It MAY be a problem because of the gray market aspect. Check out B&H Photo, you have the choice of buying gray market or USA products. I ended up getting my glass from Cabela's about 15 years ago. One year ago I sent em back to be cullminated(sp) and to have the center hinge snugged up, no charge,no problem, because I had the proper warrenty paperwork. I feel that Ziess has the medical market dominated....After reading a technical bulleten I think that Swarovski glass is a bit better. HOWEVER, the amount of measurable difference(made by machines) could hardly be picked up by the human eye.You cannot go wrong with any of the top manafactures glass.Just beware of future warratnee issues.....A lifetime gaurentee isnt worth crap if your warrantee is void because of gray market issues.