Interesting what you say about the initial pull away. It was a concern for me (reading and watching tests, the US videos are less negative) until I test drove one. My current car is a 200bhp diesel Jag which is quicker 0-60 but feels a lot slower 0-30 which is what I feel is the most important (for pulling out, roundabouts etc) I also had a Mazda 6 Sport Nav 2.2d which felt no quicker, my only car that was quicker was a CLS, but build quality was awful.
I have also gone standard Premium model, the only thing it lacks for me is the stereo (my Jag has the Meridian 825W surround) but I can live with the Pioneer it is much better than the German standard systems. I liked the cream interior until I sat in a 1 year old car that was covered in marks and denim stains, so have gone black with Mesa red. To spec a similar sized German it would need another £10K on my budget (I too used Carwow for price matching to get a huge discount making a new one cheaper than a 1 year old) Just a shame it doesn't arrive until the next year