Here's my experience,
The Rifle Basix SAV-1 (1-3lbs) is a nice trigger. I currently have one installed on a model 11 .243. It's not the safest trigger when you get it down around the 1lb range with very little sear engagement. Basically it's a modified savage trigger with more adjustability like the old three screws minus the wire. They're nice triggers but over-priced as of lately.
The SSS competition trigger (12oz-2lbs) is more of a trigger "assembly". In my opinion the SSS design is safer when set at its lowest poundage with minimal sear engagement. The SSS is drop in installation like the rifle basix and only marginally more in price and well worth the difference.
I have no experience with the Timney triggers or the Rifle Basix SAV-2.
Jeremey
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