I used mk3 springs as i had them laying around, as you do (they do have their uses i guess) but they were way longer than the eibach springs - it would have sat really high at the rear.
Wheels are not with me yet. Hopefully by the end of the week. Starting to think about putting the twists back on with the rear 'sorted'. Less sag may mean no scrubbing. If that is the case i might have some cheap boxster wheels to sell!