I have used Novitec and currently on Sparco ( Alfa 155 specs).
I noticed that the Novitecs are very low ( 40mm ) and being in a country where the road conditions aren't very good, it's a pain in the butt.
I am now on Sparco and its an Alfa 155 spec springs. It needed the rear ones to be chopped off 1 ring of spring, but other than that it rides fine as I reckon the spring rates are slightly stiffer.
If you plan to use Eibach, couple it with Koni absorbers. It should ride beautifully.