For a 2003 Model 70, you have the original type of trigger.
I think any of the three will work for you, as the Timney, Jewell and a tuned factory trigger are all good.
Also, how low do you want to go? This might also give some info on what trigger will work best for you.
For me, I like my hunting rifles to be between 2 and half lb and 3 lb pulls.
As for a gunsmith, as I noticed in one of your other posts that you are in the NYC area, you can check a few out in CT.
When I lived in Ct, I had this group do some work for me. He was very nice, willing to help and very busy. Per Google maps, it looks like he might have moved to a new place. It has been 10 years since I used him though, but I would again if I was close. He is also a Winchester authorized gunsmith.
Gunsmithing LTD
3 Lacey Place
Southport, Ct 06890
ph 203 254 0436