My thought process is if you're going to buy a $100 trigger anyway, I'd just buy the Axis II with the accutrigger as it's less hassle and a great trigger. As an alternative, MCARBO makes a spring kit for the Axis for $20 that gets good reviews. I can't speak to the Axis kit, but their kit made my Marlin 795 a whole different rifle.
https://www.mcarbo.com/savage-axis-trigger-pro-kit.aspx
I was recently looking at an Axis in .308, ended up holding out and got a really good deal on a Savage 10 in the same caliber, a decent step up.