I've had one of these Aurions (ZR6), I'd take your Rolla any day!
It was fast but had way too much power for a front wheel drive, you couldn't take off with any kind of enthusiasm without the traction kicking in (especially in the wet).
Once moving it was fantastic and I did love that it blended in with traffic once you backed off.
It is a very practical family car. Much better for carrying 3 kids!
I sold mine and got an 83 Rona, I miss the Rona far more than the Aurion.