Worthwhile Upgrade?

[ran_out]

I'm currently thinking about getting a GTX470 to replace my HD4870 512MB. Can anyone advise if this is likely to show a decent improvement in performance?

Will be used for gaming at 1920*1200 res, 4870 has seen me well for a while now but think it's getting about time to get something new.

I was considering waiting for the 6xxx series as I won't have the option to go sli with my board but would quite like to buy something today - is the 470 likely to be a good option as a single card for a while ?

(specs)
Phenom ii 955 @ 3.4GHZ
Asus M4a79T Deluxe
4GB corsair dominator 1333mhz
700w coolermaster silent extreme psu
Win 7 64bit

 

[ran_out]

Decided to just go through with it after much chin scratching, should turn up tomorrow so something new and shiny to play with on my day off. Got the Asus 470 from this week only offers.

Ati prices this gen just haven't come close to the amazing value they were around the time the 4890 was released when you could pick up a 4870 for peanuts. If the 6xxx series is shown to completely beat it on price and performance then i'll just auction it and buy again in the new year and hopefully wont lose too much - with the price some people will pay on ebay for cards.