Trackpoint buttons on EnduraPro suck. The trackpoint itself isn't very popular either, but I actually almost prefer it to thinkpad trackpoints, provided the cap is replaced by a classic dome for thinkpads.
Keep in mind, that trackpoints require excessive amounts of force from a single finger, as the cap ages (and gets stiffer), and most 3rd party replacements are outright terrible out of the box.
On a different note, I currently have a Logitech TK820 wireless keyboard/trackpad combo for testing. The surface is smooth, relatively large and sensitive, but still doesn't respond to my skinny cold fingers half of the time… and clicking the whole trackpad (as "popular" these days) is awful. It seems Logitech has learned from that, and K830 already has ordinary physical buttons. I can imagine using it for gestures only (esp. scrolling) though, but it'd require some DE configuration and getting used to. I don't think it's much of an option, if I can just stick to using the keyboard.
All in all, I prefer trackballs, but here's the problem: picking a good trackball and embedding it like kurplop is the only way to do that without compromises. Trackballs embedded by manufacturers are generally awful (from outdated sensors to crap bearings to awful buttons like in Compaq rack keyboards with built-in Logitech trackballs). I tried to simply put various input devices on top of Kinesis Advantage, but gave up, because (1) they were too high, and (2) I wondered what kind of idiot had thought making the middle surface curved (read: not flat) was a good idea.
In the end, I use external trackballs kinda externally and wish there was a way to integrate a rollermouse-like pointing device somewhere.
