I love my Brother 1500 straight stitch. It's a work horse and very good stitch. Does great FMQ with the long harp.
Because it's a straight stitch, I also have another machine for zigzag. It's heavy, so recently bought an 11# small brother for taking to classes. Love my new/used Bernina 830, can do everything but travel easily-too heavy.
No one machine can do everything. I like having several machines so that I can get the best I need at the time.