Car battery charger (AC to DC)...

Any good suggestions for a car battery charger (120V AC to DC charger)?  Figure it never hurts to have one at the house in case a car battery dies or something?  Thinking about this one.....any issues for a 2007 Tahoe?
 
http://www.sears.com/shc/s/p_10153_12605_02871222000P?keyword=car+battery+charger
 
Is 50amp enough to start a 2007 Tahoe?
 
Thanks!

For the price, it should be great.  I am looking at one also.  We just had our second dead battery in a year.  It jumps fine and hasn't had any issues since.  Just a random dead battery.  Personally, I am upgrading to an Optima battery and getting a battery tender.  http://www.batterytender.com/ that is what we use at work so I like it.
 
Good thing about Sears, they are local and will stand behind their stuff.