Before the Zed my most recent car was a 2003 EP3 Civic Type R but before that I've had a JDM classic Impreza WRX (dyno @295bhp), Golf VR6, ST24 and various other relatively fast cars. To me the Zed is definitely the best car I've owned to date and does not feel slow at all.
When driven hard, foot to the floor changing gear at every shift light point you can very quickly get up to some serious licence losing speeds.
Yes it's very different from my old Civic which felt great when wound up above 6000rpm in VTEC and it doesn't have the pin you in your seat effect of a turbo boost like my old Impreza but still it's a deceptively quick vehicle.
For me I just love the linear power of the Zed and incredible torque in pretty much any gear at any speed.
Seriously Linus27 I think you really should go for a good test drive before you truly make up your mind. Remember as well that people who have owned these cars for a while will have gotten used to the power/acceleration available just like you do with any car really.