One of the best reasons to be considering the 360 is the availability of manual transmission cars at little to no premium. On F430, MT cars draw a substantial premium, due to rarity of MT models. I also feel the F430 was one of the first Ferraris designed to take advantage of the floppy paddles.
Having a modern Ferrari with MT is definitely something to consider.
Also, with 458 now becoming a "used" Ferrari, both the 360 and F430 will be competing for buyers with the vastly superior and better looking 458. Overall, Ferrari made lots of their modern V8-based cars; so, depreciation is expected for years to come, with the exception of the 360CS, F430 Scuderia, F430 MT, and 458 Speciale.
Current: 2007 612 F1 HGTS
Previous: 1987 328 GTSi, 1983 512 BBi Boxer