Respectfully I disagree. Prefire bikes have better camshafts. These bikes were painfully lean from the factory to meet US and Euro emissions. Once properly jetted these bikes run wonderfully. Your statement that CVKs are nightmare when old and worn is misleading. 11 of the 12 highest milage bike bikes reporting on this forum are carbed. Most carbed issues come from improper tuning, Corn Gas and improper storage. Its just a matter of time until we start see seeing EFI headaches...fuel pumps and injectors damaged. There are countless threads on this forum of battery issues with EFI. None of this is a secret. Carbed Bikes are cold blooded at start up. Nature of the beast. If properly tuned you should be off 1/2 choke and idling in half a city block. EFI also brings Canbus. EFI has its pros but it also has its cons.Definitely, 2008 - 2016 EFI models. More power and torque from a standard bike and more reliable.
I should qualify that last comment. The carb bikes are no more or less reliable with regards to the engine, but the CVK carbs are a nightmare when they get older and worn. They're hard to keep a good idle when cold, but do get better when warm.
The EFI models are so much easier to live with. Cold starts are a dream, with reliable idle and easier to tune with mods, just upload a tune correct for your mods.
Its all Blondes, Brunettes and Redheads. Beauty is in the eye of the beholder. There is a reason prefire bikes are so desirable. Made in England, Better build quality and that that beautiful tank. The only draw back to early bike are the Rusty garbage Italian Steel wheels and crappy rear hubs that break spokes. Replacing the wheel with an EFI Thruxton is the ticket. My back up wheel is the original 2001 hub with a Buchanen spokes and new church black aluminum rim.