The must haves - a machine and a darning/quilting foot., universal needles
The nice to haves - feed dogs that drop, gloves, extension table, extra lighting, good wine.
The cadillac version - supreme slider, quilting needles, topstitch needles, larger machine, full table extension with drop in for machine, design wall, huge stash, unlimited fabric budget,expensive wine,...... oops, now I'm getting into the platinum version....