I'm not sure what the exchange rate is in US dollars but I think if you're spending that much then it wouldn't be much more stretch to hit this card
If thats doable you'd see much better performance than the GS version. You can see on the VGA charts Here
the improvement for that extra $40(US). Might be worth considering if you need to stick with AGP for a while. Not to mention the fact I'm not sure the GS would be a very big leap in performance over your current card.
I hope that helps some. If you absolutely must go with the 7600GS tho I'd choose XFX just because I've heard several people complaining about some BFG cards lately but thats speculation and to be taken with a grain of salt.