You can get a lot more bells and whistles with a drop-in, plastic bobbin case. However, if you plan to mend jeans or do a denim quilt, you want a metal hook/bobbin system. In the shop, we see those plastic bobbin cases jam on heavy fabric all the time.
The Bernina 330 is a solid machine that sells for around $900. You'd probably want to add the walking foot, which is around $160, and a quarter inch foot, which is about $9. I have an older model that's equivalent to the 330, and I quilt twin size on it. And I have a home business, in which we sew tons of Velcro and hem French Terry cloth. I also do all of my piecing and applique on this machine. It doesn't have a cutter, but those cutters are over-rated and tend to cause mechanical problems.