Charlee,
Please forgive the shameless self promotion but here is a picture comparison of the original Davis Long or Boye 10 and the MTx190. I recommend the Boye 10 if 3 needles will last a lifetime and the MTx190 when the machine is used frequently.
http://cgi.ebay.com/ws/eBayISAPI.dll...#ht_500wt_1180
Jon