I have a Brother 1500s straight stitcher which is very good. My Pfaff died and so I traded it in for a Brother Innovis 600 which I find ticks the main boxes for me as to what I want in a sewing machine:
1.Stop/Start button, 2. Needle position button (stops up or down) 3. Presser foot adjustment dial, 4. Easy button hole 5.Thread cutter 6. Twin Needle sewing 7.Feed dogs can be lowered 8. Speed regulator 9. Reverse stitch.
If it has all of those requirements, the rest is icing on the cake.