I just switched from a TM Stealth 2 to a Cobra DS Adapt Max K. May not be for you coming from a TSi3, but Cobra drivers are flat out legit.
My son got into golf about a year and half ago and destroyed two old Callaway drivers, so I got him a "new" but out of date LDTX on the cheap. I tried it out for fun and it was stupid easy to hit well. So, got the womens version for my wife, who was getting back into golf after decade or two break. A lesson and she keeps up with the guys from the women's tees, and hits the fairways most of the time, half the time we'd be taking her shot in a scramble.
My Stealth 2 turned into a punishing dominatrix that forgot the safe-word, so I explored other drivers and ended up with the Cobra DS Adapt Max K and it has been a ligit game changer for me. Instantly dropped my score by 5-7 strokes playing fairways waaayy more than used to and is every bit as long in the screws than the Stealth 2, maybe longer on average with a more penetrating flight into the wind. Again, may not be for you coming from the TSi3, but its a unicorn of sorts because it hits a better spin rate with the right shaft, and insanely forgiving.
I would say if you are looking for an inexpensive alternative the Darkspeed line would be a good "gamble" at that price point, but the Future Fit with 33 adjustments in the current line would allow for a LOT of adjustment if you have swing changes over the next few years.
"Green" is the new RED.