the one you find, fall in love with & fits into your budget...all of them are nice- you will know when you see the one that is right for you!
i love my 99-K; picked it up for $20 in pristine ready to take home & sew condition...after looking at machines for almost 3 years---walked into a building-saw the 99-K & knew that it was THE ONE! before asking for a price...