I have the Tein Sport springs on my 05 WRX and it is very much a daily driver/family car. I have three young children and there are no issues with the ride being too stiff, bumpy or uncomfortable.
I had always planned for Prodrive springs, but Duncan from Hypertech (they supplied and fitted the springs, Whiteline ARB's, ALK and droplinks, also fast road geometry set-up) advised me to go for the Teins over the Prodrive springs.
He is the expert, not I.
The car now has fantastic handling capabilities but is still reasonably comfortable to drive.
Here's a pic to show you the ride height........