I have not driven one. But it's always nice if ones ACTUAL preference is cheaper no? I prefer the 610 as I love it's world conquering capability coupled with the ability to get sideways and hold a drift at will.

I personally would feel less invincible in the 580 and internally would see it as the step down that it is - in both cost and performance. Interestingly Lambo sees it this way too. I wonder if they just need a message to "sell" it. For example I've owned several 911 and 911TT. A GT2 which is the 2wd version cost MORE than the awd version. Porsche actually invested in the 2wd car and made a concientious effort to price it at a premium.