Hiho bd311!
If it´s about reliability the answer is clear as mud: the UCE is your bike. I´m around the US, British and German RE-forum and I never read about a major blow-up. Scotty just described the advantages of the UCE over the iron barrel.
At the start of the series in 2008 there was a faulty shaft in the gear box, but this issue was resolved by a genaral recall of all affected bikes. Some bikes develop problems with the starter and the handling of the Bullet Classic is - in certain cases - highly dependent on proper adjustment of all components of frame and suspension. If anything that´s about all you should worry.
Don´t get me wrong: the UCE-Bullet is a modern motorcycle, build by people who pay attention to traditions in machinery construction in an uncommon, very intensive way. That´s what many RE-fans really like a lot.
There is, however, a way to get a (almost) new original 50ies-bike: the iron barrel-Bullet, sold new up to 2009. These bikes are easy to get in the US (as well as in Europe) with low mileage. Alas, maintenance is critical and time-consuming, in addition nobody should be surprised by breakdowns once in a while, as Indian machining quality was sometimes a bit unsteady in the days before UCE.
The result of this effort, however, is the unique opportunity to get grandpa´s 1954-bike without a restoration and acess to wordwide aftermarket part supply.
Whatever you´ll take: you get a big grin stamped in your face whenever you´ll ride your Bullet. For free - guaranteed!