In my book, high value SC would be that very same Zegna in the $500-$1000 range
Now, really depends on many things: your location (availability of outlets with large discounts), which Zegna line are we talking about, etc, etc... If it is a mainline Zegna, I wouldn't consider $2000 much of a discount. I personally do not have experience with Zegna, but brands of similar quality/price such as Pal Zileri, Corneliani etc, I was able to find great stuff (suits and jackets) in the above mentioned price range. Even better stuff from makers such as Belvest, Caruso etc.
Assuming you don't have access to B&M outlets, ebay is a good place (usually there is a good description of the item in terms of dimensions), yoox also (a bit of a crap shot, but good return policy). The key is to know what you like, what fits you and what are your measurements.