Actually, I saw your message this morning and I was planning to answer it this afternoon - however, since no one here knows squat, I imagine that my answer wouldn't be any help anyway.
But, what the heck, so....
Laminated glass is made up of two sheets of glass and a plastic interlayer. The two primary types of plastic interlayers most used in laminated glass are PVB or polyvinyl butyral and SGP or Sentry Glass Plus. PVB is a relatively soft and pliable plastic and it is the same material that is used in the windshield of your car; however when used in an impact product it is three times thicker than it is in your car's windshield.
SGP is a much more rigid interlayer that was designed specifically for the impact application.
Since your primary concern is sound-blocking you want to use PVB. SGP does little in sound blocking application versus PVB.
Glass for your home is available in three "states"; annealed, heat strengthened, and tempered. Glass used for laminated glass in impact windows can be made using annealed, heat strengthened, and tempered.
The salesman who told you that "annealed laminated glass is not as good as just pure laminated glass. Lawson has annealed laminated glass
." either doesn't know glass very well or else wasn't good at explaining - resulting in a misunderstanding. The term "pure laminated glass
" has no meaning.
Annealed glass used in laminated make up will meet your specifications. There is no sound control advantage to using either heat strengthened or tempered laminated glass. There can be windload advantages to using heat strengthened or tempered when laminating, but it isn't as common (by a good bit) versus using annealed glass.
Impact glass comes in thicknesses ranging from a bit under 1/4" up to 3/4" or more. Generally, thicker impact glass is going to be an improvement in sound blocking ability - it also can be a good bit more expensive for several reasons.
From a security standpoint, laminated glass using SGP is a superior product to using PVB. However, both products will stop a 2x4 at 50fps from passing thru the glass. The same 2x4 will punch thru 3/4" plywood more times than not and 1/4" impact glass will stop it better than 95% of the time depending on a few other factors.
Few break-ins occur when the windows are in some ways stronger than the walls.