Welcome Melbo! I"m mostly with Miriam on her selections. Picture 41/78 is the Singer 15 or 115. It looks like it needs some help but it's a more capable machine IMO that the others. They're great machines for free motion work as well as regular sewing. The 66 and 99 are good machines too but probably not as good a choice for free motion quilting. The Singer 128s use a long bobbin and while they're still good machines, they do have a steeper learning curve than the others. I haven't tried free motion work on a long bobbin machine so can't say how they are for that.
Rodney