compatible psu?

i'm new to pc gaming, having played my brothers console but now he's in college, so in terms of computers i'm an amateur and don't know what i'm looking at here-

i want to upgrade the psu in my computer, a compaq presario cq5110f (http://www.shopping.hp.com/shopping/data_sheet/np185aa.html), for a card that requires 400w power supply with 12v current rating of 26a. i'm looking at this psu, a CORSAIR CMPSU-400CX 400W ATX12V V2.2 80 PLUS Certified Compatible (http://www.newegg.com/Product/Product.aspx?Item=N82E16817139008)

is everything in order? what information should i be looking at?

also, should i get higher wattage psu than the minimum, or will the card run fine at 400?
what about this- Antec Basiq BP500U 500W Continuous Power ATX12V Version 2.01 Active PFC Power Supply (http://www.newegg.com/Product/Product.aspx?Item=N82E16817371004)

 

Yes I would go with the Corsair over Antec, also what graphics card are you planning to buy? Also for 20dollars more you could get this OCZ 600w which has two 25a 12v rails, so this is also good for upgrading in future
http://www.newegg.com/Product/Product.aspx?Item=N82E16817341017

 

the card is a radeon hd 4670 by asus- good? i was kind of leaning towards geforce.
here's the link http://www.newegg.com/Product/Product.aspx?Item=N82E16814121274&Tpk=asus radeon hd 4670

 

Yep Asus is way to go if they are cheapest

 

thanks for the help