I currently have a 6600 GT in my computer (3.2 gig HT processor, 2 gigs DDR 3200 ram). I was wondering if it is worth it to upgrade to a 7600 GT or a 7900 GT. Would I see significant performance improvements? I play Guild Wars, BF2, CS:S, AoE3. Also, has anyone heard anything about the supposedly silent Gigabyte 7600GT? I would really like to get my computer quieter. Finally, what is the best brand to buy for such a card? Is there really that much of a difference (I don't plan on overclocking at all). Thanks!