I just retired my Razr two days ago. After two or three years of service, I think the speaker was blown, since all the audio was getting more and more distorted. Despite that, it was a good phone and I liked it. To answer your questions...
I never used it, but I believe the Razr has a feature within the Calendar application that allows you to schedule appointments and such. You can set up separate alarms for multiple events. It interfaces with a PC via a standard mini USB cable, although to sync you need to also have the Motorola software. I bought a copy of the software on eBay, and ended up with a bootlegged copy of an older version. I was still able to upgrade it and use it, but it was a major undertaking to get it updated, and in the end, I was still running an illegal copy, so I eventually stopped using it. (I still installed the free Razr drivers on my XP machines, so I could use the USB cable to charge the phone.)
I replaced my Razr with a Blackberry Pearl 8110. (Not much bigger than the Razr.) My local AT&T store had a good sale price on the Blackberry. I don't really intend to use many of the PDA features, but the sound quality and reception -- the main things I need in a phone -- were very good in my area, so I went for it. One feature I'm pretty jazzed about is the built-in GPS navigation. (It costs an extra $10 per month, but I figure I'll give it a try, and if I don't get my money's worth from it, I'll cancel that feature.) I have a nav system in my Lexus and love it, but with the Blackberry, now I'll have one in my pickup truck, too. It's also handy for finding nearby stores or services like banks. And unlike the DVD-based system in the Lexus (which was current as of the year 2000), the one in the Blackberry is updated every 3 months, so it should stay much more current. Another major difference is the nav system in the phone also shows traffic conditions -- an important feature here in the land of freeways and idiots.