I totally agree with Prism99. Get your mind around the 'needs' but do keep a list of 'wants.' Machines demo'd at quilt shows and such are nicely discounted after the show. Just approach the dealer asap and let them know what you want and can pay.
Try all machines that have good dealer accessibility and classes or help with learning ... and re-learning.
Go with whatever machine YOU bond with. By bond with, I mean the one you can most intuitively understand and operate. I had the opportunity years ago with a Bernina but that model had a little glass like area to show which stitch I was using. Well, I had little kids and a neighborhood of many more. I knew I was easily distractable and that I wouldn't get the stitch I wanted if the kids distracted me. I went with a used Singer where I knew what stitch I was selecting immediately and as that was pretty much all that was available to me at the time.
I've tried them all. I'm a Pfaff person because it had the dual feed that kept me sewing/quilting due to my arthritis.