Depends on what she is after.

Handling....looks....how low??

I have had a set of Gmax 30mm springs on stock shocks. Ride was ok sat far to high. then went onto some Spax 50mm springs. sat lower but ride was crap.

Now have Gaz Coil overs. Dropped about 65mm good thing is they are damping adjustable so ride can be hard or soft or 1 of 30 odd settings!!

I'd go for coilovers personally but they are ALOT more than a normal lowering kit.

Eibach are a good kit. or i'd go for spax.