My Excaliber EX-21 ($850) is very quiet and I like the tilt blade rather than tilting the table. Most of these parallel link saws will be lower vibration because they are moving less mass. Here's a review from Popular Mechanics showing the two types of linkage (but only up to the DeWalt - no higher end saws).
http://www.popularmechanics.com/home/reviews/power-tools/1274521 Look at the noise levels to get a feel for the vibration they'll produce. You can usually reduce vibration by adding mass like a heavy bench.
If you're just starting out, look at the Porter-Cable ($180 at Lowes). It comes with a stand and a light and is a pretty good saw for the price. There are likely some on ebay as people move up to the more expensive units. It has a vacuum port but does NOT have a lifting top arm.
Delta and DeWalt (~$500, parallel link) I think are the same saw in different colors, but others might comment on that.
Scrollsaw Woodworking & Crafts had a review of all class of saws an issue or two back. Here is supposed to be a page on reducing vibration:
http://www.scrollsawer.com/forum/beginners-scroll-saw/42879.htm