If you watch the yahoo group "sewitsforsale" you might find an embroidery module for your Bernina 630 for a reasonable price. There is one listed now for $400 including 3 hoops, embroidery foot, and carry case. I have a Bernina 440 (which I bought used from someone on sewitsforsale) and it uses the same embroidery module. I have always loved the quality of the embroidery on my Bernina. The large oval hoop goes up to 6" x 10". Your 630 would already have the capability built in, (including 5 fonts) and you only need the module. This is the listing I found (NAYY):
http://groups.yahoo.com/group/SewIts...message/127153