Radeon 4770 or 4850?

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Alright, sounds good.
I will probably end up getting a 9800GT then.. What manufacturer should I look for?
And do you mind giving me a newegg link to a good PSU in the $50 range to go along with the card?

EDIT: Wow, the stock PSU on my computer now is 115W? :O
 
So now the only thing I'm worried about is the card not fitting height-wise under the air duct.

How thick do you think the card is at this point that I pointed out in this picture?
http://i41.tinypic.com/15840on.jpg

EDIT: Maybe I'm worried, but not for a good reason. I'm unsure which way the fan will be facing.. Upwards or down. If it's down I should have no problem.. But I don't think that's right,
 



As I have written before:
1) the cooler will face upwards
2) A single slot cooler will fit under the air duct.