You really need to go test drive them, it's all so dependent on YOU and what YOU want. You might think you want a 24" machine, but then you discover that's too far of a reach for you and you really should get 18". You need to make a list of must-have features that you can't do without, stitch regulator being one among many, many options. You should probably determine what your price range is first, then research and test every machine in that range.