Need advice on Armani tux styles ?

I am getting married soon, and need some advice. I am looking on different resale websites for used Armani tux jackets, and have come across some different types, so , to help me in deciding what to maybe buy, I don't know where else to find out about the different styles and years of Armani, and what may be closest to the classic style. For instance, does anyone happen to know what or when the Classico line was available ?
Which years/models of Armani tux jackets are cut longer than others, or are all one-buttons the same ? (i like shorter)
If a jacket has silk buttons that are round (as opposed to the squarer ones seen on new jackets), then roughly how old is it ?
And the big question: Are all Armani black tux jackets tailored, and go in at the waist (if it is a smaller size, like I am) ? I do hope so, as that's the quality I really dig about them.
Sorry for my green-ness, but I had the (mis-!)fortune of trying on a brand new one-button Armani tux in a store, and now of course am convinced it is the best looking jacket I've ever put on. It's slightly out of our budget new, however, but I just may save up to get one. Have Armanis always characteristically been made with smaller armholes ? I love that about them.
Anyway, any knowledge anyone can impart will help me in my quest. I still have a couple months. Oh yeah, which is best --cummerbund, suspenders, neither, or both ? I plan to have a classic medium-to-large black bowtie, and either a wingtip or reg. collared white shirt with onyx studs. Going for as "classic" as possible.
Thanks so much.
Flip