Here is an original thought!
Why not get the car checked out?.... Standard suspension wears out too, The spring rates get weaker with age, the shocks loose their rebound rate, the ball joints wear, and the bushes perish! Then there is track rod ends, pot holes and kerbs that throw out tracking and alignment, your tyres wear unevenly and the traction isn't what it should be!
What I am trying to say is:
You were happy with the way the car handled or you wouldn't have bought it right?
What has changed?
I don't want to waste your money mate... But most owners who swap to lowered, uprated suspension rave on about their modification "Oh it's handles fantastic, it does this , it does that" Yada, Yada!
Yet, how many actually fit brand new OE Alfa springs, dampers, wishbones, track rods and new standard tyres and get it all aligned properly?
I can bet you that if you did that, you too would have exactly the same sensation, it would be just as dramatic a difference.....
I know...... I have done it recently on my Father in law's 156 2.5 V6 (with new OE parts and Pirelli P-Zero's on 16"s)
And..... My Brother in law's 156 2.4JTD (with Bilstien B6 dampers and Eibach sportline uprated suspension parts and Toyo Proxes on 17"s) at the same time as a little experiment... It makes sense to strip two cars down.
They both needed the suspension parts and tyres freshening up and both handled similarly before hand.
Yes the difference was night and day despite both cars being reasonably good before hand ... But I have to say, the OE equipped car handles a lot, lot better and is more pliant on the road... Just what we have found, that's all
I doubt very many owners and forum members have had the opportunity to try doing two cars with different suspension or even considered going down the OE road and plumbed for uprated stuff...
Of course it is going to "feel" better, it's because their old suspension was that bad
Just some food for thought