Just a note to all people about ATI and NVidia card naming process, to help distinguish how "powerful" a card might be. Their numbering system is broken down as such:
XYYY where X = the generation and YYY - the series
As we all know, cards go through generations. For ATI originally we had the 100 cards, which technically were 0100 (first generation). We then moved onto 1000 (generation 2) and now we're moving up to 2000's (generation 3). This is more a difference in technology (ie 0100 cards were DX8, 1000's were DX9, and 2000's are going to DX10).
The actual POWER of the card, is signified by the series number, no the generation number. So the higher the series number, the more "powerful" the card. For example, a 1600 series card is going to be a lot more powerful than a 2300 series card, from a performance standpoint. You'll get better frame rates, etc.
If you have a choice between a 1600 card and a 2600 card, take the 2600 because you get same performance (600 series) but a newer genration (DX 10 vs DX9). But if you're looking for higher frame rates, take a 1600 over a 2300. Hope this helps.