Do it!
Take the Zed, would be my first bit of advice. Whilst hiring an AMG or similar car would be fun, you'll want something nimble on those mountains to make the most of them. Get a good geo before you go to get all the understeer dialled out and you'll have a blast.
As above, do the Lambo, Ferrari and Pagani tours if you can, they're all pretty close to each other so would seem a shame not to.
A combination of Expedia and Trip Advisor is a good way to pick hotels, I didn't get a crap one at all on my trip. For me, things like wifi and free parking were a must, and Expedia does mention if it has those.
Choose your time to go carefully. Go too soon and the passes will still be closed (some are still closed today for this year), go too late and they'll be heaving with traffic and you'll hate it.