Legacy 3.0 model year 2007

Hello, I would like to buy a Legacy 3.0 Aut., the question is only if a model year 06 or 07 is going to be. I already tested a 06. Unfortunately, at the moment a Mod. 07 is hard to find for a test drive. Has someone already been able to drive a Mod. 07 and what interests me above all – what do you think of the new SI-Drive? Is it worth waiting for Mod. 07? I find the Mod. 07 inside nicer, Xenon would be there too, on the other hand it can be safely compared with Mod. 06 save something… Many greetings