Which PDA is better - Palm OS or WIndows Mobile?

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I have been an ardent user of PDAs. In fact, I am a diehard fan of palm os. Since my first pda, I have already changed about 8 different ones. I mean I keep upgrading to newer models. Recently, I realised that windows mobile too have it's fine points. I may not have used one, but it is good for us to discuss the good and negative points of both types. What is your view on this? Share your experiences no matter which type of PDAs you are using. You can also tell us which brand and model of PDA is your favourite and you are using it. Why did you choose so?