Bebs has given some good information.
Tim Walker is one of the best at assessing 360's. Also he does not sell the cars himself, so he has an impartial view
I would use FerrariChat forum as a good resource, full of information.
Issues that resulted in me choosing a Gallardo over a 360:
- aluminium corrosion, I was repeatedly told that they should not be parked outside as they will suffer.
- need for perfection, the Ferrari world is small and well recognised independents tend to know most cars, if anything is remotely wrong with a car it is like it becomes untouchable. I got warned off a car as it was parked outside under a car port! I was also reminded that some Ferrari owners just like to wax their cars and look at them.
- eat batteries, must be kept on a battery tender, not that big a deal
- 360's are regarded as bulletproof, however, sine digging abs I found plenty of people with niggles
There is also a very active ownership, which I think is unparalleled in the UK for other Supercar marques.
There's a lot of information, both DIY and cost saving advice, on YouTube and Forums.