Owning a truly collectible Ferrari and keeping it in nice shape would be a labor of love and a reasonable investment.
But the 308 GTS and 308 GTB (and the 328 GTS and 328 GTB) just weren't that special. And unfortunately, in addition to being hand-built in Italy, they are now also old cars, and worst of all, they are very maintenance-intensive- the engine comes out every 15K miles for the major service (fluids, filters, tune-up, cam belt replacement, etc.).
The 348 TS and 348 TB are a little bit nicer cars, but they are still hand-built in Italy, a quarter of a century ago, and the engine has to come out every 15K.
The F355 is materially nicer than the 348, but they are still hand-built in Italy 20 years ago...and the engine has to come out every 15K. The F355 IS, however, the newest mid-engine Ferrari that you can readily find on the market with a manual transmission. For that reason, a lot of people love the F355.
The 360 Modena is measurably better than the F355. It was hand-built in Italy, 15 years ago, but at least you can do the 15K service without having to take the engine out. Unfortunately, it is VERY hard to find one with a manual transmission, even harder to find one in "proper" Ferrari colors with a manual transmission, and the "F1" robotized transmission is horrid to live with. The 360 Modena is the last one with the Dino engine, which dates back to the '50s.
The F430 is a beautiful revision of the F360 Modena, has the new and much more powerful F136 engine (483 horsepower), and they are only about 10 years old. But they were still hand-built in Italy, so not only can we not afford to buy one, we can't afford to drive one either. We couldn't afford an F430, but we also couldn't live with a 360 Modena (and we REALLY couldn't live with anything older than the 360 Modena), so I finally just ordered a new Porsche convertible.
Porsche really has the "Everyday Supercar" thing down. You want four seats, you can have four seats. You want four wheel drive, you can have four wheel drive. You want two trunks, you can have two trunks. Whatever your transportation needs are, Porsche probably builds something that will work for you. And because it's built on an assembly line by Germans, instead of being hand-built by Italians, a late-model Porsche will be much more likely to start when you want it to start, it will be much less likely to catch on fire when you don't want it to catch on fire, the fluids all stay where they belong, the electrics are not possessed of Satan, and so on. Porsche cars may be less emotionally inspiring than cars hand-built in Italy, but for daily transportation, they work much better.