Hi Aberdeen and welcome. For you first post, you've chosen a big one. There is probably as many reasons to chose a particular saw as there are members on this forum. Each member has his own reasons for the saw they like.
I've only been scrolling for a couple months. I started with an entry level WEN 3922. I wanted to find out if this would enjoy the hobby. This saw only has a 16 inch throat and the upper arm is stationary. (Just a note, this is a pin or pinless saw) If I would have waited a few months the WEN LL2156 scroll saw hit the market and I would have purchased it. This saw has a 21 inch throat, the upper arm lifts and the table is much larger. My little WEN is very stable since I've made and mounted it on a solid stand. I can't say anything about the Delta, DeWalt, King, Excalibur or any other saws but again, many members here have their reason for liking them, or disliking them.
I have been looking to upgrade and I've narrowed it down to three saws. The Seyco, the Pegas and the Jet. The Seyco has a nice large table with an optional protective cover and the stand is an integrated part of the saw. The Pegas is well know for its superior blade clamps but the stand is an option. The table on the Pegas is smaller than the Seyco but they do have a larger table that is optional. The Jet has a unique blade clamp that clamps and tensions the blade in the same movement. The bottom clamping system on the Jet makes this pretty much a bottom feed only saw. All three of these saws are in the neighborhood of $800 to $1,000 depending on the accessories you buy.
To say saw "X" is the saw for you is impossible. You have to figure what would work best for you. With me, it was a saw where the upper arm will lift to make it easier to feed blades through the project, a deeper throat, a larger table, excellent customer service and a good warranty. The Seyco and Pegas saws have a 2 year warranty whereas the Jet has a 5 year warranty.
Hope my rant was helpful. I can only suggest is to take everyone's advice and decide what would work best for you. And as one member mentioned in his post, don't limit yourself to thinking you will only cut puzzles. The scroll saw is a pretty versatile machine and can create beautiful projects and art. Check out some of the work members have posted on this forum. I think you'll be very impressed.