my advice is not to get too basic Susie. You sound as though you will get the sewjo and will fly. What do you want in a sewing machine? Some ideas
Portable or not
Some variety of stitches
Automatic buttonhole
ability to take a walking foot as many fabrics today are stretch and knit
Personally I would go to a sewing machine shop and look closely at their trade-ins, that they have serviced
I have bernina 380 and bernina record vintage as I love mechanical. I bought the latter second hand from a bernina engineer, fully refurbished
I would not get too computer based. I love both these machines of mine and have gone up and up the sewing machine scale from singer treadle that I used at 9. Bernina is, as far as I am concerned, the pinnacle and can handle any fabric