Have you seen the wacom inkling? http://www.wacom.com/en/products/inkling.aspx
The thing with the smart pens is that they're chunkier than I'm used to, and then I worry about the smoothness of the pens.
I know the LiveScribe doesn't have gel based ink refills, which is basically the only type of pen I write with. I find the friction from normal ball point pens a little uncomfortable.
Some good starters are the LAMY Safari, the TWSBI 540, and the Kaweco Sport. All of these cost <$50 and can take bottled ink (with possible modifications to the Kaweco), reducing refill costs drastically.
I, too, used to think gel pens were the bomb, but writing with a fountain pen is just something else. :D
If you're trying to do mirror writing they become awesome again, but that's not a frequent use case:-(