Maggot, I would first ask what the the primary purpose of each gun, blasting, bench shooting, hunting, competition etc... and follow up with questions along the lines of:
-How are your fundamentals?
-What is your goal weight for trigger pull?
-Are you looking for single stage or two stage?
-If you're using for hunting, are you in a blind, hiking the high country in a snow storm or sitting on the edge of field in a tree stand?
-Are you ever going to be wearing gloves while shooting? Do you have sausage fingers? Both of which drive do you have enough room in your trigger guard to use a flat trigger shoe without running the risk of a negligent discharge every time you shove your fingers in.
-Do you have any nerve damage, arthritis or some other debilitating factor impacting your fingers or hands?
-What type of trigger surface do you prefer, fat/wide, flat curved, thin, groves, adjustable?
-How well does each gun fit you? Can you adjust the gun's fitment?
-Do. you have a side bolt release?
Admittedly, you might end up at the same answer depending on how you respond to these, but some of the questions above may eliminate potential triggers. Unfortunately, like many things, triggers to me are a personal preference item, that requires hands on experience to find what you really like. That said, there are limiting factors depending on brand so more info would be required.
TT is apparently still working out the kinks on their two stage, but they do have flat and curved triggers. Timney has flat, curved, adjustable / replaceable trigger shoe and single / two stage triggers. Jewells are as Rob pointed out are like a Swiss watch, but that makes them more susceptible to foreign matter and some of them don't include a safety or a bolt release button.
Also if you haven't experienced it yet, friends don't let their non-shooting friends with sausage fingers shoot their 2oz triggers nor loan out said gun for them to hunt with. Another concern is I don't want to drop a 2oz trigger out of a tree stand in the hopes that sear is going to hold.
Trigger Techs are excellent triggers. If they fit your requirements, I can say I haven't had any issues with my 3 and would buy again. I shoot the Specials because I don't see a justification for the extra $100 for the Diamond. Most guys I know wouldn't be able to tell the difference between the two if they were blindfolded and the triggers were adjusted to the same weight. I also don't need to go below 1.5# on a comp or hunting gun
I have Timneys as well and I love my Calvin Elite, it has over 10k rounds and dry fire on it with out an issue.
I run Geissele on my ARs but have no experience with them on my bolt guns and probably wouldn't try one unless it was a gift given my satisfaction with the TTs and Timneys.
I also have Jewells, but they are on dedicated guns and I see no need to swap them based on cost and effort. They server their purpose, but I won't be intentionally purchasing any in the future.
As for your MVP, it looks like JARD also makes a drop in for it as well.
