as the title says, I am wondering how the stock suspension compares to the dealer upgrade SPT springs (and struts?) that was offered on 03 wrxs.

I was thinking of buying used with low miles, but i have permanant back problems and do drive a lot. I like the stock ride its easy on me, also considered tein H tech.

Or are full coilovers the way to go, I heard HKS hypermax have a very nice ride.

Thanks for the input