I have no experience with Vista, but I've handles several of the Samick bows. I don't think any other bow in that price range can touch them--I've shot lots of bows that cost a lot more that, in my opinion, weren't nearly as good as the Sage.
I'd much rather deal with a company who specializes in traditional archery like 3 Rivers vs. a company that picked up traditional gear as an afterthought (as most of the "big box" hunting stores did).
Chad