Hi, depends on what you are looking ofr and what you want it to do. I have a tungsten t3 (newer model is the t5). Apparnetly this has one of the best resolution screens for web browsing, although I dont use it for that.
There are, i think 2 operating systems, one the palm and then a cut down version of windows. I was very aprehensive about the palm, but it is brilliant. I use it for diary, contacts, typing reports (much smaller than a lap top when out on the road) and GPS.
Not sure what you mean by centrino technology. The palm links and synchronises with the pc and it has blue tooth and infra red so can connect to various divices.
Hope this helps!