AMT250 M350ZB....... Not that much difference!
In all honesty, go drive one. It all very well us sitting here telling you it's great (we are an owners club so we will) but until you actually get behind the wheel will you know if it's for you or not. It's linear, not thump in the back and it's a GT car rather than a proper sports car.
My advice is to go and test one out to answer your own questions.
As for being quick enough to pull away from motorway tailgaters...... it's a 3.5 V6 with on average 300bhp. If you're in the right gear you'll lose them (and your license) quickly. If it's someone in a quicker car that's ready then you wont. Simple as that.
I agree whole heartedly with Dan (Ekona) about 0-60 times. I hate them being used in an argument. Load of rubbish. In gear times or like he says 30-100 is far more important to me. The Zed performs brilliantly in gear as this is linked far more to torque. My pick-up will smoke a little corsa with a boyracer behind the wheel if I'm rolling, Standing start a G Whiz would thrash me.