Depends on what you want to spend. The geiselle triggers are the best out there right now. You would probably want the DMR or the SSA-E. Then you have drop in units like the timney or chip McCormick which are nice too. Then you have your basic two stage trigger, the rock river NM. I had the rock river in my coyote gun for a couple of years and thought it was great. Then I started reading about the Geiselle triggers and decided to buy one. One word....awesome. You can look at the application chart on their web page and it describes each trigger and it's preferred use in pretty good detail.
I use a skeletonized 3lb timney Looks bada** and feels bada** trigger barely even moves when it drops the hammer!
I do not see what the big difference in the 2 Timney's, Non skeleton and skeleton, except $$$$$$$
There isnt any performance dfference it is only the looks. Some people prefer the thin trigger some prefer the skeleton. I really like the way the timney feels!!!