Jewell is indeed a top trigger. It runs about $100 or so more than the others and it is very nice for someone that is building a 700 into a super accurate rig with a custom barrel, good stock, and some gunsmithing. However, I don't know if it is worth the extra cash over a Shilen or Timney for a factory rifle (700 ADL).
If you want to spend the cash you can't go wrong picking a Jewell.