Questions about OBD II tools.

Hi guys,
I have several questions on the OBD II and the tools for it. My car is Dodge Intrepid 1997 and I noticed it has an OBD II connector.
Since I am thinking of buying a scanner for it, my question is:
1) From where do you guys suggest me to buy a OBD II scanner so that I can know what are the problems of my car (suppose there are problems)?
2) I googled a while, and I find there are two kinds of scanners: one is a independent tool, another (seems cheaper?) is a special cable plus a software, which connects to a PC. I am thinking which one is good? The later usually is much cheaper: is that reliable? Does it run on WinXP?
3) Do these scanners work on different cars? My car is Intrepid 1997, my brother's car is a Ford Taurus 1999. It would be nice if the scanner can work for both.
4) How much more information can such a scanner tell us than the standard key on and off computer codes? Can I say that the OBD II can tell us the maximal information and is the final resort in terms of locating the problems of a car?
I appreciate some detailed answers or URLs, I am newbie for these stuffs. :-)
Thanks a lot and have a great day!
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Try http://obddiagnostics.com
You can see the screen shots of the software as well.
I bought this and it works great for my lexus and honda. The software works great on winxp. This software can monitor lot more sensor data than a handheld cheap scanners can. I can plug it in, log the data, drive around then come home and replay all of it to see how different sensors reacted during this trip. This is a nice gadget to play with.
There are many things you can do with scanner tools of this type which you can't otherwise. For example if your intake pressure is low, you know that your filter is clogged or throttle body needs cleaning or something like that. No code is generated for this condition. You can adjust your timing better than the timing light as obd II tells you exacly what it sees than guessing with the timing light so on and so forth.
-Paul

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Thanks. I will check out the url you mentioned. :-)
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I'm guessing this will not work on a 1993 3.3 Grand Caravan. Is there any 'like' software that does ?
thanks, Nick

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Correct only '96 onwards.

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