I have had all 3, I just recently sold the Chaparral which had the s30v blade. There is another version of the Chaparral that comes with the CTS-XHP blade as well. Of the three knives I prefer the Sage 1 with the liner lock. The sage 3 (3.5oz) is the same size (3" blade) as the Sage 1 (3.2oz) , has the same CF G10 laminate scales but uses the Spyderco bolt lock kinda similar to the Benchmade Axis Lock. The Chaparral is the smallest knife of the three mentioned coming in at 2.5oz with a 2.8" blade. It's a good blade if your looking for something discrete, office friendly, or a classy piece that is easy to carry for a nice night out. For EDC I prefer the Sage 1 due to its simplicity, I am not a huge fan of lock backs even-tho they are stronger than liner locks and they are kinda of hard to close 1 handed. Sage 1 has a very smooth blade which is easy to deploy,it's easy to close, has a open pillar construction vs both the Sage 3 and Chaparral, and just just a good all around size and weight.
Any of the three knives you mentioned are fine, it all comes down to personal preferences. My suggestion is to look up some youtube videos and check reviews and actions on how the knife looks etc.