7600GT or XFX XXX 7600GT OC?

[hawk_eyeBF2]

I'm going to buy a new card, a 7600GT. But I'm wondering whether the XFX XXX 7600GT overclocked card is worth an extra $50 odd bucks?
Can't I just overclock the normal one to those speeds for free?

These are the two cards i'm looking at:

The Normal 7600GT

The XXX Edition (overclocked)

Is it worth the extra $50-60 for the XXX edition? Can't I just overclock the normal one to the XXX speeds?

 

[cyrax]

You can overclock it, but it won't be covered under the warranty. Good choice in card too, I have the same one. I got mine from www.computerlounge.co.nz. They're very reliable.

 

[hawk_eyeBF2]

Apart from the clock speed, is there any difference in the XXX one and the stock nvidia one?

 

[hawk_eyeBF2]

From this list: http://www.pricespy.co.nz/pno_7950.html

What manufacturer is the best? ie. Nvidia, Asustek, Galaxy, Pixelview etc etc...?