questionswhat should i look at when buying a wireless…

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Get one as cheap as possible, with decent ratings.Well know brand, good reviews on Tigerdirect and Newegg.
This is what I recommend. D-Link (DIR-601) for $22 free shipping.
http://www.newegg.com/Product/Product.aspx?Item=N82E16833127288

Be careful with ratings a router that has lots of features especially one that supports DD-WRT will get 'extra rating points' for the features, which you will not use.

Now about your old router.
I have found that power supplies is the cause for router failures over %50 of the time. Even an under powered power supply can power a unit but not give you full functionality.

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@caffeine_dude: Thanks for the input! That was incredibly helpful. I didn't know the power supply issue. Hopefully it will be a while before I have to troubleshoot my router, but that is good information to know.

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Just thought you guys might want to know. Got the router you recommended and it is AMAZING! It is way faster than my old router and I'm so glad I listened to you. So thanks for making my xmas eve super awesome. :D