Like bruce just said, dont be too concerned with stamped vs cast ...stamped will work just as well. That being said, make sure you are getting what you are paying for...i would expect cast wings on a used saw in the $300 range.
The jet seems to be the nicest saw you have shown so far, if its close enough to go look at it i think i would be interested in that saw, especially if it comes with the beis clone fence....jet has several fences available, some better than others...and i think the beis clone was the best.