External Hard drive purchase help

Hey everybody. I've had my 2.4 GHz MacBook Pro since March, and have loved everything about it. Well, almost everything. I hate that my hard drive is only 185.99 GB (so it says). I have a thing for watching DVD's and TV show DVD's on this thing, and have downloaded many, many episodes of my favorite shows. I only have 20 GB left. I'm in the market for an external hard drive. I don't need anything huge, like 1 TB or anything. Maybe something around 250 GB or 320 GB. Plus, speed really isn't a factor to me. I just want to transfer all of my downloads off of my HDD. Also, I don't want to spend that much. I was thinking around $70-$80 max. I was perusing New Egg this morning and found a few. I don't know much about these brands or anything. Anybody know anything about these? Also, if they are garbage, anyone have any recommendations? Thanks

http://www.newegg.com/Product/Product.aspx?Item=N82E16822242009

http://www.newegg.com/Product/Product.aspx?Item=N82E16822101006

http://www.newegg.com/Product/Product.aspx?Item=N82E16822111020

--Chris