Are wireless routers better than non-wireless ones?

Hey all,
I've come to this forum, because the last time I had a problem with my computer, this venue definitely gave me the best answers and I learned quite a bit of information.
Anyhow, I have recently moved and want to connect my computer to the optimum online (the long island version of road runner) modem. However, I need a router, because cablevision is too cheap to provide one (even though Verizon does for their DSL service, and it's about 60% of the cost of time warner, but that's not why I'm here...haha). I actually have a few questions regarding this issue.
1. Is a wireless router going to give me as much as speed as a non-wireless one? (Keep in mind, I live way out east on the island, where it's pretty rural)
2. I'm concerned about virus protection. My dad's PC is completely infected with viruses. Even though he'll be purchasing a new one in the next few months, I'm concerned that they may infiltrate my computer. I have Virex and I've had no problems whatsoever with viruses (or is it virii), but I want to continue with that clean record. I saw there are some modems with firewall built in. Does that make a difference?
3. Verizon let me keep their DSL modem with inputs for 4 ethernet cables (the built-in router I suppose). Is there any way I can use this as a router for the cable service? I apologize for this question, but if I can find a use for this modem, I'd like to (and DSL is not available in this area).
Thanks a lot. Happy New Year!
~Jeremy

Jeremy, First welcome to the discussions,
Wireless technology is just a few mbs slower than a wired connection, for the most part you won't notice it.
Cabble is different than DSL. With cable you will get better more consistant speeds than you will with DSL.
Normally DSL is furnished through phone lines and the farther you are from the ISP's Servers the slower your connection is. This is not the case with Cable.
You are correct about Viruses. Mac is not to date affected by viruses Trojans and Malware. It is a good idea if for no other reason than peace of mind to have Virex or
http://www.clamxav.com/
All ISp's have firewalls on there servers, as well as any Router you buy will have a Firewall that is normally configured by typing in 192.168.1.1 in your Browser this will open the Routers Utility settings. This information is with any Routers Paperwork.
Mac OSX has one of the best firewalls you can also set up.
Normally almost all Viruses are sent through e-mail while they won't affect the UNIX operating system when you get an e-mail with a virus you can pass it on to another windows user who can be infected.
If you have the adapter that plugs in to the socket that accepts the Cable in and the Cat5 or Cat6 out then yes you can use it, you will need the Ip Address that your service provides. If your serviceuses Cat 5 or 6 Eternet Cable the technology is the same worldwide. It really depends on what your cable service has furnished you with.
You should be able to run an ethernet cable from your Internet Service Providers Modem ( Instead of plugging it in to your computer) Plug it into the Uplink port of the Verizon Router and try it. Like I said you may have to get into the Utility and set the Ip for you to do away with the other one, you should only need one.
It would however be the hot set up if you can use the Modem Router Combined.
There is also a good chance if they haven't hooked you up yet show the tech that comes to hook you up the Modem Router you have and if he can he will probably use it if you talk real nice.
Remember for the most part a Modem is a Modem, and a Router is a Router. Some have a few different features but the technology is the same and works under the same principles.
This should help. Don

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