Torsion bar upgrade

I know I have seen it asked here before, but I am now wondering about it myself, and need to figure out if its worth the 300 bucks..

what kinda benifet in the ride, drive, and cornering am I going to get if upgrade from the .081 torsion bar, to the .092 bar?

My bars are the small ones, and I have a 340 in the car now...I need to change some suspension parts, which will require the removal of the torsion bars, and of course after its all done an alinement... So my big question is, Is it worth buying the better bars???

(i know it may seem like a dumb question, but this is the first car i have owned that has torsion bars, so I dont know anyting about them or how they work)

Thanks for the input

Shane!