As far as the Dunlops, they haven't performed very well at any events I've been to.
The Azenis RT-615 have been a much better choice.
I've seen the Dunlops chunk up pretty good.
I think the reason the Dunlops are attractive now is due to the closeout prices.
At full tread depth down to 1/2, the Azenis stick pretty damn well in the rain.
Below that...be careful.
For your car, a 215/40 is closer to the stock gearing.
The 215/45 Azeni runs quite a bit wider than the 215/40.
I'm not sure why, but it's close to a 1/2 inch.
But, it's also taller and heavier.
If you spin the tires a lot coming out of a corner, the taller tire will help.
But then again, so will letting up on the gas a bit.
I'm assuming you have aftermarket wheels??
Meaning...low offset? (40-42mm)
If so, with the 1.6" drop, you most likely will rub on heavy bumps with the 215/45,
unless you're running some pretty high camber numbers in the front.
And...remember, there are other choices...
Kumho is coming out with a new tire...
^^^Ah man...I got on my soap box in that thread.