"If I have to order it online how can I tell it is version 4 ?"
You can't. The pics online are often not updated.
"Also can the version 3 modems display the provisioned rate ?"
I don't believe they can. I will ask a friend who has one and confirm.
"If for some reason I decide to get the Motorola will they display the provisioned rate?"
No, they do not.
"Know any good source where I can get a Linksys Version 4 router and modem online ?"
Newegg is a good source but dicey which version. If you decide to order online, call and talk to a rep. and ask about their return policy if it's not a v4.
The pic. of the modem from Walmart is a v3. This doesn't mean they will ship you a v3, only that they may not have updated the picture.
The pic of the WRT54G router is an older version.
You can differentiate the befcmu10 version 3 from befcmu10 version 4 through the lights on the front panel of the device. With the version 3 under the Internet you have 2 LED lights labeled cable and activity. With the befcmu10 version 4 under the Internet you have 3 LED lights indicator (DS, US and Online).
You are supposed to be able to see this light configuration on the picture of modem on the box.
»Re: Linksys BEFCMU10 Modem
Here is a link on how to identify different WRT54G versions: »Re: WRT54G - Wireless-G Broadband Router V5.0--
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