ohhh i didn't realise you "didn't" want to lower the car hehe
you shouldn't need to replace the springs.. i've never really heard of them wearing etc... are you purely just looking for a different ride?
as far as suspension replacement i would just replace shocks... all bushes... a-arms sway bar etc and probly a strut brace to stiffen her up a bit and make it a little more fun round corners